My husband's dog growels and bites at me and his mother and I'm 8 months pregnant. I'm at a loss at what to do?

You've go a serious problem. Get rid of the husband! (oops, did i say that). IF YOU WANT TO KEEP THE DOG: you should SERIOUSLY consider contacting Cesar Milan or Victoria Stillwell. This dog has some serious issues that should have been addressed alot sooner. Honestly, if it were me, I would put the dog down. You are putting yourself, your mother, and your soon to be newborn at serious risk. If your husband doesn't see the problem, and is unwilling to either seek IMMEDIATE help or put the dog down, then you need to go stay with a friend or family member until something is done with the dog. Cesar may be able to help you, and he may not. But ignoring the problem will just make it worse. And I WOULD NOT try to rehome the dog, b/c then you are putting other people at risk. Good Luck!