Also OP, you struggle with anxiety issues, right? When I was at the peak of mine in college (sophomore spring for whatever reason), I found that I was way more tired than normal. Regular exercise, even 30 minutes (I know it's cold and harder to get to the gym but it really works) can make all the difference. Also just getting into a routine and sticking with it. I was without fail always more anxious in times of transition and this affected sleep, eating, etc. Tell your friends about it and make plans to study or eat with them so that you have something occupying that time