Feeling distant from my Spouse

I am 22 weeks and I feel like my spouse has become very distant. We have a 4 year old so she keeps us busy but there is very little affection shown between us. Ever since we found out I was pregnant there has been little to no intimacy in the bed room. I’m at a lose, didn’t have this problem during my first pregnancy. It’s really starting to make me question things about myself and our marriage. Anyone else have this problem?