Feeling crappy about sex

Does anyone else's partners just not seem interested in sex with them since being pregnant, I'm 23w and my other half admits to watching porn when I'm asleep in bed beside him when he used to try his luck, he 'sorts himself out' 2-3 times a week and not even try with me and says it's because he knows I don't want it as much but I've tried explaining that if he tried more I would feel more attractive In my changing body, it's not the fact he's watching porn as that's never bothered me it's the fact he's going straight to that and not bothering with me leaving me feeling non-attractive and not desired anymore any tips on how to possibly feel more sexy and get him to understand without sounding controlling