Help pls

My husband told me since being pregnant I have been alot more moody and b*tchy. I do see myself overreact at times and its hard. We had a rough couple year & half but it was getting alot better til I got pregnant. But I also feel like he can be insensitive at times. He's a great husband does alot for me and our house. But at times he let's a situation escalate rather than calming down or walking away.. I feel like maybe we will end up splitting up. And ill be a single mother which is not a bad thing but its not what I want. What should I do ? Idk how to feel or what to think. I feel so messed up rn.