Re: MIL gets sick - I get blamed! What can I do?
This to me is the most worrying line from your post. Your husband sounds like a complete bully, and kicking you out of the house is nothing short of abuse. You’ve sort of implied that the reason he hasn’t made you leave home this time is only because you’re pregnant.
You should take a firmer stand in your own relationship with your husband. I know it’s going to be hard, but stop bending over backwards to please him and his mom. You’ve done your job by apologizing. There is nothing else you can do. Is there an elder in the family you talk about this to? Preferably someone whom your husband trusts. He needs to understand that his pregnant wife’s health may be affected as a result of this constant stress. If things gets worse, I’d suggest taking a break from everything and spending a few weeks with your own family. Perhaps you can get them to mediate?
Good luck, I hope things get better.