I honestly don’t know what to do 😪

I’m currently pregnant with my first child and sex has become so uncomfortable for me so tonight my partner and I were attempting to have sex (usually i would just tough it out) but tonight I couldn’t bear the pain but obviously he doesn’t know so he kept asking what wrong I just didn’t say anything because I’m not ready to tell him I’m pregnant he got so upset by me not responding he went in the bathroom slammed the door and started rambling on about how I don’t respect him I was so confused he got so mad he left and wouldn’t speak to me with raise suspicion for me because his car is currently in the shop getting a paint job so we’re are you ? And who are you with ? He doesn’t have an iPhone but when I came over to his house I noticed a hot pink iPhone charger plugged in by the couch so who charger is that? I noticed that he’s just been letting his phone ring when I’m around and refuses to answer it . I just feel alone like even when I do decide to tell him about the baby that things will only get worse i feel as if we can’t even hang out anymore with out arguing. I can’t accuse him of cheating what if he’s not cheating but to me their no other logical explanation I just want my child to have both parents but I’m not going to tolerate his behavior.