I just started taking Adderall for ADD. My doctor put me on 10mg 2x/day. When I take it one day it works great. The next day I take it and I feel cranky, depressed and my heart rate is up. My stomach is also a little upset. Today I couldn't use the eliptical at the gym because it was hard to breath. Does Adderrall build up in the body so it is a higher dose the second day?

Also when I take the Adderall, I don't want to socialize. Is this normal?