I'm 17 and have never seen a gynecologist...

My moms pretty strict with sex and stuff. I have had my period since I was 11 but I have never been to a lady doctor I'm 17 now and think it's time to go but my mom doesn't think I'm old enough!?? I try and tell her that's not how it works..... just like I'm not allowed to wear tampons because she thinks I will lose my virginity to them!?!?!?