I’m 17 And I Have Had Really Irregular Periods Since

I’m 17 and I have had really irregular periods since they started when I was 13. I’m currently on day 60 of my cycle (not pregnant) with no sign of it coming any time soon. I’m worried that I might have problems with having children in the future. I’ve already been tested for PCOS but am worried it could be a sign of early menopause