Do I really have pcos?

So I haven’t had period from last 4 months but my periods were irregular always. This time it seems concerning to me. Somebody told me that 4 months is too much now and uterine lining can thicken and it won’t be good.
My doctor has disappointed me. I told him about my irregular period and then he saw ultrasound and said ovarian cysts and then said there is no cure. It’s gonna be like this forever and asked me if I want birth control and that’s it. It was really rude that he didn’t even try to explain.
Can anything be done. I do night shifts now and my lifestyle is getting sedentary.
Also, I am 25 right now. What are the chances of pregnancy in future?

Help please