Have you tried talking with a counselor at school? I'd recommend that you do so. You need to talk with someone. If your mother feels that it's unnecessary, look elsewhere for their professional opinion.

There are counselors and school psychologists at almost all schools in the US. Counselors typically deal with vague issues (unless you have a repoire w/ the counselor), concentrating on the "right" classes for you. School psychologists do lots of testing, in order to make sure the student is performing tasks properly.

One of those two school employess would probably be the best for you to start with. They can direct you, to the right "T", and stand up for your rights. Ethically, they need to make sure that you are in a safe place. Safe= no emotional, physical, sexual, or verbal abuse occurring. They should look at your case more closely to protect you.

(((gentle hugs))) to you.