Husband doesn’t want to have sex

Prior to pregnancy, my husband told me he thought most pregnant women were attractive. Well, I’m 38 weeks and since around 34 weeks we have had sex maybe 3 times. It’s been 2 weeks and nothing. I’ve asked him and he’s said “I don’t know when we are supposed to stop” but I told him it’s just fine to have sex, it will even help labor start and still nothing. I do know he sort of cringes when I told him a little of my mucous plug came out and he doesn’t like that I fart around him on accident now (I can’t help it!) Don’t get me wrong, he still is very loving, he tells me I’m beautiful and rubs my belly, but doesn’t initiate sex at all. It’s honestly getting to my head and making me feel really unattractive. Like he would rather look at other women or just take care of himself because he isn’t attracted to me. Anyone experiencing this?