Long story incoming.
About 5 years ago a group of my friends and my girlfriend at the time wanted to do a tough mudder race. Several of my friends had done a few before, I had gone and watched them and decided it was kind of stupid and pointless and didn't want to do one but ultimately my girlfriend convinced me to do it with her so I started training. Before this I had been in fairly decent shape but was never, ever an endurance athlete. The large majority of my workouts were always strength training with very little cardio but I could still do something short and meaningless like a 5k with little effort. The first 4 months of training went pretty well and I was up to 7 miles on training days at about an 8 minute pace and I was getting in some of the best shape I've ever been in, when suddenly out of nowhere one day I couldn't even go a mile without feeling like I was going to faint.
The symptoms were really abrupt and basically ended my training:
1) I would get very pale
2) Cold sweats
3) Blurred vision
4) Nausea
5) Severe fatigue
6) The shakes
7) Headache
8) Instability when trying to stand or walk, dizziness
9) My gums and teeth would hurt, it felt almost like I had just flossed but flossed too hard.
Those symptoms would last for about 10-15 minutes and then I was completely fine. This didn't happen until I got my heart rate up to around 155+, at all other times I was completely fine and could still lift weights without any issue whatsoever. I went to my primary care doctor at the time and he diagnosed me with exercise induced asthma. He gave me an Albuterol inhaler to use before exercise and when symptoms occurred. This didn't help at all so he gave me a few different steroid inhalers. None of those worked either. At this point several months had passed, I had separated my right shoulder, my repaired left shoulder was getting inflamed again and work got really busy so I just let it go and basically stopped exercising all together.
Fast forward 3 years and I had gotten fairly out of shape wanted to lose about 30 lbs so I started doing going back to the gym. At first it was just getting back into the strength training which was fine and then I started to do some light cardio hoping the symptoms had just gone away on their own. They didn't, they got worse. At this point I could only get my heart rate up to around 135 before I felt like I was going to faint. So I went and found a new primary care physician and explained to him the symptoms and what my previous doctor had done and prescribed. He gave me the same albuterol inhaler but told me to use two puffs instead of one. Tried it and no change so the next few months went like this:
1) Blood work which came back completely clean. Was told everything was great and I appeared to be in really good health
2) Cardiologist. They gave me an echo and did a stress test. Again everything came back great and I was told I was in very good health
3) Pulmonologist. Found out I have a very attractive, young pulmonologist, wanted to lie to her about how unhealthy my lifestyle had actually gotten but didn't, they gave me another battery of tests and again couldn't find anything. She prescribed me a different steroid inhaler and told me to use it more often. Again, that did nothing for the symptoms
At this point I had friends, family and co-workers acting like second hand doctors. "So and so had this thing that sounds kinda like your symptoms but actually nothing like your symptoms. They had superdisease1, ask your doctor about that". It actually got so bad I really did start asking my doctor about all the wacky shit they were telling me. One friend told me he had a friend who had similar symptoms and it was grave's disease. So I made an appointment with an endocrinologist even though my doctor never referred me to one. He sent me in for more extensive blood work and again, nothing wrong.
At this point about a year and a half had passed with a bunch of other tests having been done, chest x-rays, etc etc etc. Nobody can figure this shit out. This past January I got really sick. Not really sick like some of you guys, I never post in here because my problems seem inconsequential to all of you battling things like cancer, but pretty sick nonetheless.
It started as just a cold, turned into a bacterial infection, then I had bronchitis, then I got the worst flu I've ever had in my life, then I got pneumonia. I was sick from the end of January until the middle of April.
When I was sick with the flu I told my doctor I was having a really hard time breathing, couldn't take anything more than the most shallow breaths without it causing a severe coughing fit and it was worse when I was laying down. He listened to my lungs, said they sounded ok, even though I couldn't take a deep breath even in his office and then prescribed me an Albuterol inhaler. How am I supposed to use an Albuterol inhaler when I can't breath in? I tried it anyway when I got home because hey, he's the doctor and nearly coughed and choked to death. I called him and told him so he prescribed me prednisone (on top of the tamaflu he prescribed for the flu). I finished that prescription and no change, so he sent me in for a chest x-ray which he said revealed the pneumonia. So he prescribed me... a higher dosage of prednisone. 4 a day for 4 days, then 3 for 4 days and so on. I finished that and again, no change again and at this point I started looking for new doctors.
I couldn't even really leave the house and had no energy to even cook for myself so it was basically nothing but frozen and fast food. I've gained 15 lbs since I got sick. I'm 5'10 and sitting at 200 lbs feeling and looking fat as shit. I finally started feeling back to normal only about 2 weeks ago and could finally leave my goddamn house for more than 20 minutes just to restock my frozen burrito stash. During all this I started looking for a new doctor because my current doctor, I feel, is worthless.
Today I went to the gym for the first time in almost 6 months (which sucks because before I got sick I had been hitting it hard for about 4 months and had made a lot of really great progress and getting back to my old self). I decided to do some DDP yoga after work as well because I want to lose this weight fast. Barely made it through it and my heart rate never got above 130. When I went to get up off the mat after I was done all the same, original symptoms hit me again.
I have no idea what to even do at this point and I'm getting really tired of having to eat like a 13 year old girl just to not gain any weight because I can't do anything active. Anyway that's my rant.
EDIT: One semi-important piece of information I forgot about, I've always had a heart murmur. I've had several echo and stress tests done in my life to get cleared to play sports and exercise. Every one I've had done always came back good and I was always fully cleared to participate in anything athletic or strenuous without issue.