My boyfriends mother doesn't think I'm disabled

So let me start off by saying I have Extreme Anxiety, EDS (Elhers Danos Syndrome) and Postural orthostatic tachycardia syndrome. I've also had bad allergies to shrimp and peanuts. Anyways so about 8 months ago I moved in with my boyfriend, a week after I was settled we moved my service dog in with us, (we also live with his mother and brother) we all share a very large house and pay rent. But over the past 5 months I've noticed his mother and brothers have been making fun of me for being disabled and even going along the lines of calling me a fake. My boyfriend has tried telling them to stop and how they are wrong; however that isn't helping. The last time my boyfriend spoke to his mother she told him I needed to get over it and stop lying to myself. At that point I began to get very upset. A month after that I became pregnant after my BC was counter acted by some medication. I was very excited to be having my first child and at first my boyfriend was too, but immediantly after telling his mother he suddenly changed his mind telling me I needed to abort it and risk never having kids again. His mother and him ganged up on me and made me feel ashamed for having a living child inside me. I felt like I was forced to go through with it and it still bothers me. Now I'm in need of a new service dog as mine is about to retire and she's denying me the right to own a service dog. I've explained that the dog is there for my safety because of all my allergies and mobility issues. But she claims there is not enough room. Now she has been calling my current service dog a FAKE. And began bullying me again, but now she is doing it with her other sons mocking me as I come home from work limping and crying because how much pain I'm in. She even has gone as far as taking my medication to get high, and then giving them to her other son; claiming his is forgetful and needs them, when reality is that he is just lazy. She has always been very rule and neglecting to my needs and only cares to tend for her older sons, and mostly it seems she resents my boyfriend because of me. I've felt that few times she's been close to posioning me by putting shrimp near my food and contaminating it. Even offering me a birthday cake that had peanut oil in it. She knows I'm allergic to both and the reaction will send me to the hospital, what should I do? So my question is should I break up with my boyfriend to escape this toxic and manipulative mother in law? Or stay and deal with it until we eventually get a place?"

Update: we have found an apartment and my boyfriend and I along with 1 friend will be moving during the summer. His mother is still a major problem and has now threatened to sell my new service dog, I will probably be filing a lawsuit once we are all moved and settled.