As I see it hasn't been posted yet, let me just say the obligatory:
"It's just stress"
(Then I won't bother to define stress, leaving what I just said a paradox, wrapped in a riddle with an enigma and things such as that)
Ok, now that I'm done playing devil's advocate, I hear you 100%. I have good and bad days, myself, but I have found even my ability to spell which I used to take pride in has gone to pieces among many examples.
I never thought about if it could be the medication. I always blamed it on whatever disease process. At any rate, all I take is Colazal.
Try to get proper sleep, yes, and follow your GIs instructions if they're a good doc and if not find another one. And keep hope alive, things can get better.
Wishing you the best