menopause at 17??

Like my periods have been weird ever since I first got it 5 years ago. Im 17 now and my period is like 3 weeks late. And it's not that im pregnant because I'm on bc. And it could be my birth control messing with my period, but it was weird before I started bc. Like my period used ro be 5 days. Then one time it was 9 and it was 9 days for a little over a year. Then I started bc and my periods have been 3 weeks long. And now its a month late. Like i looked up stuff about early menopause and I have most of the symptoms.
I don't know what to do