Would your mom consider going to family counseling with the excuse of "helping to deal with you?" I am thinking it could help her change her view of what is going on and help you get some space to breathe. I can't help but think leaving you stuck up in your room isn't going to help you cope and work through the things that are going on. It is just a thought.
Carrie

PS I used her words because sometimes it is easier to get someone you want to go to therapy to go there if they think they are going to make you better instead of the real reason which is to get them in for themselves. My therapist helped me to use this tact to get my husband in to marital therapy.
CK