I agree with the others too. It must be hard for you both. I'd be looking for my own space where I could be comfortable and have a place to call my own. But I wouldn't think being hypochondriac is fun either; from what I have read it is very debilitating and exhausting and scary, not to mention the costs involved.

But I do think you can be happier in your own space where you don't have to contend with her anger, lack of self control (which obviously bothers you a great deal), allow yourself the luxury of finding out about the services mentioned by Byz, if you are on the entitled list for these things with your health and mental health issues then you should apply for them and have your own safe space.

Please keep posting and keeping us up todate on your situation so that we can keep supporting you and cheer you on. I've been in the position once of having to stay with my sister and it wasn't fun believe me. It's easier to get along when you don't know someone and are just housemates because the dysfuction of family relationships can't barrel its way into the equation.