Just do what you can handle right now. And always remember that we we do care about you, no matter what.

I understand about canceling things that seem like they should help, because you can't deal with them. I do that all the time too. I've been delaying making a real effort to find a new internship and/or job for months, and haven't let myself have any time off because I couldn't deal with it last time I tried. But I sent in four resumes and applications last night. When you're ready, you can try again too.