What would you do ?

I’m at a loss here and not sure what to do.. for starters I am bipolar and I make extreme irrational and impulsive decisions. I have been medicated for awhile not but that isn’t 100% affective. Anyhow I met my now husband late last year and everything was so wonderful, I was eager to get out of my hometown and I impulsively made the decision to move away and moved up with him. Life was great, he was kind and loving. He was So selfless and it was literally a dream. Everything was going great and then I found out I am pregnant. I have a history of reoccurring miscarriages because I have several auto immune disorders. These immune disorders have caused extreme damage to my body and still do. Anyways as soon as we found out he talked me into getting married for insurance purposes and of course no matter the bad feeling I had I did it.. everything changed, he is so different. He is rude, condescending and constantly makes me feel bad about myself. My immune disorders cause me to constantly feel like garbage ( then add pregnancy) and he always tells me it’s fake and that none of my illnesses are real. He always makes me feel bad about being sick and will say awful and rude things. He verbally and mentally fucks with me. He gets upset That I don’t want to have sex and makes me feel bad. Now mind you I have an 8 year old and he says he wants to move back home and doesn’t like it here. He has recently become weird and hates it here. I’m at a loss of what to do? Do I get an anulment and move back home ? I have no one here at all to help me and I’m scared. I’m scared he’s going to push me into a corner where I have nothing.. I have no family and no one to turn to here. I barely got a job and that’s all I have. I’m about 13 weeks pregnant now which makes it harder