Need help with my elderly working parent. Any advice?

My mother is 69 and still working full time. She has a slip and fall resulting in a metal arm and shoulder implant. Since then she has stopped doing most of what she used to do. Her blood pressure is dangerously high. I left school recently to move in with her and help her get back on track, expecting to move back home and resume my education. However, its all gone awry. She does even less now and relies on me for nearly everything...even things she can do for herself. I still need to complete my education so that i can better support her into retirement but I'm stuck here now. She treats me like a personal maid and guilts me for wanting to leave to complete school. She has No social life and never has in the past so there are No friends of here that i can refer to. She's always been a slob and misplaced things so its difficult to determine if dementia it Alzheimer's is part of the equation. I don't know what to do and could really use some help and guidance.