This one's free: Have you tried a covid jab to the frontal cortex bilat?
40,2C, pleuritis and backpain, uhm, tylenol til the discomformt goes away. Fluctuating Tp can be anything from simple infection, pneumonia, discitis, abscess or just you not taking antipyretics regularly. I assume you see a GP, blood samples, follow the plan for antibiotics and pain relief. Temporally you should get better steadily.
Back exercise
Want to help prevent back pain? Improve your strength and flexibility with these exercises.
www.mayoclinic.org
Buy some kettle bells. 8Kg x2 to start with, then upgrade to man sized +16kg when you've got a rutine. Find a podcast.