What do I do?

Kind of a long story. So I'm currently 6 1/2 months pregnant with my first baby. The father and I had a rough yet amazing relationship for many reasons and ended sort of on bad terms. He told me to not come after him for child support etc so I said fine. I found out a little after from a mutual friend that he is angry and convinced the baby isn't his, to clear that up there is no way it isn't. He jumped to that conclusion when I told him I was going to be with someone else. I've never told him he wasn't his. I reached out to him last weekend apologizing for saying things out of anger and stressed to him that he was his son too. His response word for word was "Well I guess everyone's prayers weren't answered then. I was really hoping it wasn't." That response is so not like him, I've always known him to be a sweetheart and he adores kids, he was so excited knowing he was going to be a dad before we had our nasty parting. There wasn't much else said except him saying "We'll deal with it when your son is born." I'm really itching to reach out again because I just want to talk about it like adults. I will never force him to be in his life if that isn't what he wants but I feel like texting and arguing about it over a text his so high school- I find myself nervous to reach out because I'm afraid of his response though. 😔 Stupid I know. My friends suggested sending him an ultrasound pic on Tuesday after my appointment since the last one he saw was at 13 1/2 weeks. Would that be dumb? I don't want it to anger him more. Should I reach out again at all or just leave it alone? It's a child for crying out loud. It's not something small. This sucks.