Worried about infertility

So I’m 15 and obviously not trying to have a baby lol but my periods are very irregular and I’ve had them since I was 11 and it’s never regulated. I’m starting birth control this month so hopefully it helps. But when I was 13 I was physically,sexually and mentally abused by a 16 year old that wanted me to be pregnant and we dated for about 2 years (we started dating when I was 12 till 14) anyway he tried to get me pregnant constantly and beat me for not becoming pregnant. And I had a positive test once but then bled I might have a had a VERY early miscarriage I’m not sure because I was obviously really young and I didn’t tell my parents anything. I know Iam young so I probably shouldn’t worry but my now boyfriend is so amazing and even though Iam young I know for a fact I’ve always wanted a baby and we always talk about it (in the future of course) and he doesn’t pressure me or anything but I’m so scared about the future because I feel like I let the other guy down and I don’t want that feeling again. The thought of ever having to try just makes me so sad. I’m so sad that something that should be a happy thought is so ruined for me. Having a boyfriend at all scares me because of that I have really bad trust issues now and my boyfriend now always tells me I need to just forget the past but I can’t and I constantly have nightmares about him I apparently even talk in my sleep about it (my boyfriend says that) anyway any advice would be great thanks