Am i being mistreated?

Wow, I feel so sorry for you and I also feel that you are being mistreated. If I were you, I would let them call the police. When they get there, the police are going to tell your parents that there is nothing that they can do except evict you if they want you out of the house. The police will probably look at them like they are crazy. Also, contact adult Social Services, and apply for housing ASAP. Most areas have housing available for disabled adults. Explain to your parents or either get your doctors to sit down to explain to your parents what your limitations are. Make sure that you are in the meeting with them. Maybe your sisters can help also. Good luck.