Constantly mad and disappointed in my husband

I am 25 weeks and have had a generally happy easy pregnancy. The last two weeks I have been a complete mess. Crying, screaming and practically threatening to leave my husband. He's not innocent, he's been very unattentive and selfish (for lack of a better word). We have a 5 year old together and he is just so checked out of our family and our needs. He doesn't check on me, doesn't ask me how I'm feeling, if he can get me anything. I'm just completely heartbroken. He's out of town on a boys trip this weekend and hasn't bothered to call or text me once to check in. All the other husbands have called their wives. I'm just at a loss.