So I have been feeling very tired, and anxious, and eating to compensate for feeling so frazzled. Then I saw my adviser briefly in the hall, and she said: tired? Oh yeah, I've found that when I get really sleep deprived, it can make me feel very depressed. And then I start eating horribly.

Then she set up a meeting and that was it. It was very funny. OK, I'm not losing my mind, I just need to reset my circadian rhythm, which is horribly messed up.