Sex issues

I used to have no problem having an orgasm. I could make myself have one within minutes of sex, but ever since I’ve been pregnant It has been SO HARD. I saw my SO last night after 3 weeks of not seeing him and I wasn’t even in the mood, ( before I was always in the mood, my drive was higher than his). We had sex anyways and I just faked and orgasm so that he would finish cause I was just getting frustrated, and it burnt SO BAD. We had sex again today and I found a position that felt good, and he finished before I could, which I was about too. Is anyone else having issues with sex?