PCOS,Ovulation & OPK’S

Good morning everyone. I was diagnosed with PCOS when I was 19. I’m now 27 with no kids and married. My question is do you always get positive result on opk’s or are they just all negative? I was put on Metformin 2000mg in January 2018 after not having a period almost all 2017. I did get 3 that year with no meds. But since I’ve been on metformin my periods have came every month. I just don’t know if I’m ovulating or not. I’m using the iproven opk’s and I seem to always get a light test line on mine. But one of them was just a tad bit darker. You can’t really tell now because it’s dried and from a couple of days ago. Do anyone else with PCOS seem to be going through the same thing? Please help. Do I need to change opk’s? Just asking. Baby dust to everyone who is trying❤️ SN. When I was younger I had spot on periods but as I got older they just sorta faded away.