I'm not understanding, Kelly? Why did you move in with her? And why do you say you're not a caregiver? It sounds like she has some pretty serious psychiatric issues and is abusing you. Has she asked you to move out? Why are you putting up with this abuse?
Get out now!! Get out now!! Get out now!!! You made a mistake. When you can be of some use without putting your own life on hold, maybe try to contribute again. In the meantime, get your own life back on track. You can't give what you don't actually have, and at the moment you likely don't have the right combo to be in this situation. Even if its from mental illness and you sacrifice all to "help" her, she is not going to get nicer to you even with meds. You have to keep your own center of stability. Especially as the only child.