Husband not intrested in me?

I’m currently 26 weeks pregnant & sex is kinda annoying at times due to the belly. Prior to being pregnant we had AMAZING sex (he’s the only man who has made me orgasm). Sex was something we did often prior to the baby and now he won’t even touch me. It’s like he’s disgusted by me. Occasionally (if we haven’t had sex in a while) he’ll initiate it, but not common.

It’s been a while since we last had sex and asked him this past Friday night If he wanted to & he said “I’m sorry baby I’m tired” and same thing on Saturday. I was just so upset and felt so unwanted that I didn’t even ask today. Well, today I was on his phone (he was completely aware because he gave it to me to check through some of financials before our upcoming trip) & I just got curious on explorer... hit the private tab and there were like 4 tabs open on pornhub.

I don’t care that he was watching porn, I do too, but I just don’t understand why he can’t be sexual with me anymore. Obviously he’s horny, but clearly it’s not me that turns him on. I’m just sooo annoyed by this and don’t know if I should confront him in anyway. Has this happened to anyone?