terrified of pcos

I'm 19 and ever since I got my period at 11 it's been irregular. I've only been to the gyno once when I was 17 for the pill and I didn't take it long. I won't have insurance for 3 months so I can't go yet but I'm so scared I'm going to be diagnosed with pcos because of my irregular cycle. I'm overweight too but have been since I was about 11-12 help