Infertility

Hey guys, so I started my period when I was 12 and ever since it has been super irregular. Like I can go 2 months without it and then have a super light flow. I also lost my virginity at 13.... Yes I know that's young and there's not a day that goes by that I don't regret it.... I'm now 18 and I've slept with two people. With both people we never used condoms and they have told me that they may not have pulled out fast enough but every time we get scared I end up not being pregnant. My mom began menopause when she was 25 then a few years after being told she couldn't have kids I was born. Is this something I should be concerned about or have I just been really lucky.