28week &6 days, and sex hurts?

Is anyone else experiencing any pain during sex with their SO. I do not know the proper name for the part,but its like the bottom of my vagina entrance that hurts. It burns and feels like its ripping. My so and i barely do anything sexual anymore. This pain is only during sex,it started when i was about 20 weeks. I have no std ,or any infections. I feel really bad for my hubby because i know he wants it,but he doesn't come to me asking. I have to literally beg him for anything. This may not bother some of you but this bother me, instead of coming to me for anything sexual he will stay up late while im asleep and watch porn. Ive had that issue with him prior pregnancy because he doesnt come to me wanting it. It hurts my feeling,and make me not feel like enough. We have talked about it ,but he still does it. I just dont understand why he doesn't want me sexually anymore. Ive tried everything, ive tried fancy lingerie , a weekend away,ive tried just giving him oral,but it not enough