Husband's family hates me, and it's tearing us apart.?

I'm sorry about this. When your future in laws became cold to you when you were engaged, that was a HUGE red light that you chose to ignore. That was the time to slow down and get to the bottom of things. Today however you are a bit stuck. I think your next step depends A LOT on what your husband wants to do. If your husband is willing to work things out with you and support you, then you can consider counseling or other professional help. If he doesn't want to work things out, then he has chosen them over you and you may need to move on. Better now than later when your child is even older and it gets even harder.