E.G.
It can be extremely hectic on both ends during a pregnancy and the stressses of life sometimes get in our way of sight and we tend to be blind to theres feelings. You're not wrong to be upset and don't take this wrong but I think that he's feeling a little jealous, I think is the best word. Maybe it's just that he wants/needs some of your love and attention. Maybe the two of you could get some alone time together once a week to just focus on your relationship instead of the other life issues. Maybe that would help. I know that my husband felt neglected at times with me being pregnant and all that jazz. To top if off we have three small boys my oldest being 41/2. You guys should speak with each other and see what it is that's really bothering him, especially since you've said that he was always attentive to you. I hope this helps. Try and relax and take it easy, I know it's hard.