I have problems during my menstruation caused by the Polycystic ovary, Am I going to be menaupose early?

I'm 21 years old and I've been experiencing 8-9 months without menstruation for 3 years now and I'm really scared of what caused this to happen in my body and what could be the effect if my menstruation is very very irregular. Am I going to be menopause at the early age?