Thank you all for the support and advice. Unfortunately, I lost the baby. It was a terrible miscarriage and I ended up having to go to the hospital. I called the father of the baby- no answer. Called friends. It was around midnight. Guess who I ended up having to call? STBAXH. He watched the kids while I took an ambulance. It's the only time I've asked him to watch them since the divorce, and I really regret it. But at the time, all I could think was "I need help now."
The father of the baby still wants to work things out. He's insisting on coming over to drop off my belongings and at least "get closure". I'm assuming that means telling me more of what's wrong with me.
I had gotten used to the idea of having another child, and it was devastating to lose it. But at least I'm no longer tied to yet another dysfunctional man.
God works in mysterious ways.