I honestly don't know how to keep up with school, work, and Sebastian at this point.

Plan out your week. Keep an agenda. Write down what needs to be done each day. After you have everyday written out for a week, see what you can get done ahead of time. Try to get the big things done early in the day so the little things are a breeze. Find a routine that works and stick to it. I have an anxiety disorder, and everything seems to set it off. But when I have things organized, it helps. Good luck