Should I be worried....a bit TMI

Well since I've gotten pregnant sex hasn't really been in the picture and my husband really doesn't mind some days I'm really turned on and really want some but he says no pushes me away like yesterday we had sex and it was good so I wanted to give him a bj afterward and he pushed me away I wanted to kiss him and he pushed me away I'm 30 weeks pregnant and I've gained quite some weight is he just not attracted to me or what's wrong I ask him and he'll just shut me up I have to beg my own husband for sex why😩his excuse is the baby but that's bullshit cause when he wants to nothing matters only when I want to have sex there's something wrong and he rather look at porn I've catches him snooping around girls profiles I'm just not sure what to do