ADHD has been the en vogue diagnosis du jour for a while now. Adderall, along with Xanax, is one of the most abused medications on the market. Most people I've seen taking Adderall don't meet DSM- V criteria for ADHD, which, aside from narcolepsy, is the only FDA approved use. It has not been determined through studies if stimulants actually improve mood symptoms or just cause euphoria. On a neurochemical level, anhedonia is typically linked to dopaminergic pathways in the brain. Typically, these symptoms respond well to augmentation with something like buproprion or Abilify, if not psychotherapy.
It impossible to know what medication and treatment is appropriate for the OP (if it is even necessary) but I get the impression he is suffering from some of the late-20's normlessness a lot of people experience when they aren't sure where life is going and what life has in store for them.