Pregnancy sex tmi

So my bf and I had sex tonight. I’m 35 weeks and basically it felt good at first but the faster he went the more it hurt my pelvic area. We haven’t been having much sex lately due to my pelvic pain but that’s the first time I experienced it while doing the deed. I’m not sure if I should be worried or if I should bring it up to my doctor the next time. I hate asking my doctor so many questions lol makes me feel paranoid but this is my first pregnancy and I really don’t know much. Tbh I think I’ve learned more from this app then I’ve actually been told by her. Anyways lmk if I should be worried or not. TIA.