Cysts

​I'm asking because Ive had cysts in the past that burst with each period so my dr gave me stronger bc and that helped keep them at bay. Now that I'm off the bc and we're TTC I'm having the ridiculous pain with my periods again and the blood starts out almost black so it makes me think I have cysts again. I'm not to familiar with pcos so I was wondering if just one or 2 cysts a cycle is considered pcos or not and if not, will they hinder my chances of conceiving?