I’m 15 and unsure if I’m childfree or not

I’ve always been unsure whether I wanted to have kids or not. I’ve been forced to babysit for a lot of my life and I never liked it. When I was 14, I was sexually abused and I became 100% sure that I didn’t want kids, but recently I’ve kind of wavered a bit and I’ve been really confused. Do I have to make a choice right now? Do I have to pick right now if I want kids or not? I’ve been hearing people say that you have to have kids before you turn 30 something because otherwise all of your kids will have problems. Am I running out of time? I just don’t get it. I don’t want kids, but sometimes I have a feeling of uncertainty, and I’m not sure what to do. If I change my mind and get pregnant and have a kid, will my life be ruined? I keep hearing people say that if you don’t have kids you’ll regret it, but if you have kids you’ll also regret it. I don’t know what to do.