Hi Random_Girl_. Hope that your first day went well. I can relate to your problems with the social aspects of school, they were a problem also for me. But maybe after the first days you'll get at least a bit used to it.
You could make however your stress ball, for the future.
About procrastination, maybe studying with someone could help? Or if you don't like it because you aren'tbvery social, you could decide in advance what you'll do in one afternoon and then really respecte the programme. You could write it down to help you. For this time, do what you can at this point...for whatyou ddon't have time to recuperate, try and explain to your teachers that you couldn't organize well the study. Hope that they'll understand.
Good luck, and let me know if these suggestions seem you useful, if you want...if they aren't the right methods for you, I could try and think to something else
Hugs