I've been in a similar head space on several occasions and to a lesser degree pretty much all of the time. I assume I can't do anything because I'm somehow broken or messed up in the head and that just sucks all motivation out of me and ramps up the anxiety and fear. My therapist is working with me on motivation. Doing things even though you don't feel like you can do them. This is kind of a lame slogan but Nike kind of has it right, Just Do It. If you can get started on a task, even as simple as clearing some dishes, or grocery shopping or picking up a prescription, or getting ready to leave for class, it suddenly becomes a lot less stressful and crippling than you initially imagined it would be. It's so natural to catastrophize and assume the worst, and worse yet, assume you're the worst, but those are just thought distortions. In reality, I know you're capable of doing school, even if you need to get accommodations through your school's disability services center (I've done that and it really takes some of the pressure off). It's not about high functioning, it's about functioning, period. If you can muddle through instead of freezing up and future-tripping, you'll be in a lot better shape in the long run. Easier said than done, but that's been my ongoing experience.