20 year old, PCOS, 80 day cycles??

I’ve known I had PCOS since I was 14. I was on & off birth control throughout my high school years but around 18, my then long term boyfriend now fiancé decided we wanted to start trying to have kids. So Ive been birth control free for about 3 and a half years. My periods have always been wonky. Sometimes long, sometimes short, sometimes heavy, sometimes light spotting or brownish discharge. I’m starting to question if I might have bigger issues since i’m now almost at cycle day 80 and I’m just now getting that kind of discharge again. Should I go to the doctor? What should I ask them? Do I tell them i’ve been TTC? Someone give me advice.... I feel so alone 😞😓