Well, Vector, to tell the truth, I don't find it that bad. And yes, going for a random walk at 2am is normal. Bring your friends back mcdonalds. 'My Friend Who I Talked To About This' probably doesn't have it as bad as you, but, 'He/She/It' Has the same problem with most of the stuff. To be honest, 'They' find the happiness is well worth the sadness, but we never see 'Him/Her/It' when 'They're' depressed, because they usually just go into their room for most of it, and catch up on the eating later. Fortunately 'They' are that kind of BiPolar (Can't remember the name) Which means that their happiness outweighs their sadness by a fair bit, but it's still a problem when 'They' get hurt doing something stupid, because the risks just aren't thought of at that time. Still managed to make some money off a bet because 'They' thought that if 'They' thought hard enough about it, 'They' could fly. We said 'He/She/It' wouldn't jump. Heh.
But yeah, if you feel that you Need medication, then go ahead and use it, seriously. They exist for the reason because there are people with a bad enough case that it's necessary, so with your case, this is entirely possible.
Oh, and on a sad note... Though it's pretty out of context, and a dramatic change. I found out something today which has more or less ruined my plans for life. Well, that originally. But more or less ruined my chances of a good, or comfortable life.