Relationship problems

I’m 28 weeks pregnant today and my sex life has completely disappeared, my boyfriend doesn’t want to have sex he’s afraid it will hurt the baby, as you can imagine it’s been a long time.. so fast forward to yesterday, I met my boyfriend when he was finished work and he was in such a bad humour he started shouting so I left and went home,. After that I found out he was looking at porn videos all day and last night and again today, he hasn’t rang me messaged me or anything today, I can’t help but feel let down I’m here he could have sex with me but he declines, am I being unreasonable?