Is Birth Control For Me?

So, ever since I started my period back when I was thirteen, it has NEVER been regular. Ever. It was always either a few days early, a few days late, and sometimes even MONTHS late. The longest time I had ever gone without my period was three months in a row. So, now that I'm nineteen, going on twenty here soon... I wanted to explore birth control options not only to protect myself from an unwanted pregnancy, but to also maybe fix my cycles and or completely remove them from my life?? Would this even be a possibility for someone like me?

Back when I was sixteen-seventeen years old, I asked my mom if I could visit a gynecologist, and she told me, "There's no need if you aren't doing anything you're not supposed to." I'm still mad about it to this day, because premarital sex doesn't give you ovarian cysts, endometriosis, infertility, or even cancer. Not only that, they took me and my brother off of insurance years ago, so I'd have to pay out of pocket for a checkup... At this point, I just need advice from girls who are well versed in all of this. I'm completely new to birth control.