Here are some things that may help you.

Generally schools have a team of psychologists and psychiatrists who can diagnose you with a disorder (like depression), if you feel you have one. If it is severe enough they may recommend you take time off (I took off a semester) and come back the following year. Then you can start the treatment there. If that isn't an option, talk to them about the accommodations you can receive. They may bring recommend you go to the disability center.

Emailing teachers and telling them you're struggling with the material helps. They may recommend you to a T.A. and extend time on big assignments. If you need help planning out the assignment/paper, you can meet up with the T.A. once a week to make sure you're going in the right track. Professors and T.A.'s have office hours for a reason. They are a resource to use to get help.

If you *really* hate school then maybe it isn't for you. There are other career options you can look at and vocational schools, too.

At the very least you should see a psychologist if you haven't done so already.