I feel unable to do the things I need to do

I'm trying to get all my work done for college and it just isn't getting done. I've spent all day and I've sat down to try and get everything done and have even taken breaks to see if that helps. I've gotten nothing done. I'm very behind when it comes to everything and I'm not sure how I can fix this.

Nothing I'm doing is working. The deadlines are all lingering in my mind and yet I can't do anything to act. It feels physically impossible to do my work. I hate this.