Hi, Drew,

They're a fact of life. I think I can speak for many of us here, that these "mood swings" affect many intelligent and creative people.
I believe it is the nature of the 'gifted' beast...as much as people may admire your intelligence, they would likely blanche at
the dues that you pay.
My best advice? Learn methods of coping, like jogging, or going out and finding a late-nite coffee joint where the bands play and the conversation gets hot and funny. When you suddenly find yourself in that (bad, down) place, you need to have some "go to" already there, in place.
And BEWARE of drugs, (even alcohol)...man, they don't work! (From one who's been there.)
Take care, buddy!

PM me if you need to, 'kay?