what's wrong with me?

i'm forgetting everything lately, and i have no motivation. how do i deal with this? i'm trying to bury it under other activities, doing things, talking to people but it just comes back and hits me whenever it feels like it, which is often. and the rest of the time i'm completely unmotivated and i'm forgetting things and skipping class. forgot to bring my discrete math book home over the weekend, didn't get the work done until last night and had to ask the prof. to still give me partial credit, walk into OOP1 lab today (fifteen minutes late, because i had thought for a while it wasn't for another hour) and find out from qi that there had been a quiz yesterday (yup, skipped class yesterday). luckily he was nice enough to let me still take it, just this once.

i don't know how to deal with this though. this is like being sick, except this is something you're expected to be able to handle and not let it interfere with other things. but i don't know how...