I feel this way a lot. Didn't get anything done today; I must be an awful student. Doesn't matter that I felt awful all day and my brains are all scrambled with med changes.
Well, it's not so, but I have to keep reminding myself.
And we're here to remind you of the same - you're not lazy! It's a lot of effort to go to judo and dinner and whatnot, right? So you're doing the best you can.
Hang in there...