Does anyone else feel this? I need thoughts

I am 17 years old and I have had 5 different male partners since the age of 15. Each of which I've had sex with raw at least once. Some have even came inside of me. I've taken 3 pregnancy tests in my life and they all came out negative. I've taken 2 plan b's. I feel as though I'm just not fertile. My periods are super heavy, always have been. But I've had ALOT of raw sex and cum inside of me. I don't want to be pregnant but I don't understand how I've dodged so many bullets. Could it just be that I'm not fertile or that I'm that lucky? Please if you're not fertile or you feel the same way, help me out. Can I ever have kids? I've already been tested for any stds and I'm clean