my fault

Currently I'm 20 and my boyfriend is 27. We just started dating for about a month. He came when I was still talking to my ex gf although her and I had been broken up for 7 months. She has played me had another gf and even though that happened because I had made my mistakes I kept trying to forgive her and we were trying to make it work. However it wasn't working and I couldn't trust her. Anyways my current bf I didn't want to be with. He knew about my ex cause I told him because I didn't want a new relationship. But he stuck around everyday and kept trying to win me over. I have pcos and endometriosis. We had unprotected sex numerous of times because he knows what he wants supposedly. It hurts when we do have sex and many times don't finish. Since I have pcos and endometriosis, I might not be able to have kids. But rn I'm 6 days late. I love my ex I'm scared. I care about my new bf but he pressured me a lot and now I'm this in predicament. He doesn't listen to the word stop. I'm so confused and stuck.  I know he wants to marry me and be a family but this wasn't something I was ready for. Idk I'm just venting.