tmi period talk

Girls help. It is TMI. I haven't had AF for the last 3 years or so. yes I have been doctors but as a result nothing's come out of it apart from lose weight and track my ovulation. well 4 days ago. AF appeared and I'm still going day 1 was spotting but that's about it. i am taking vitex and folic acid and they i believe are the things that helped her turn up this month. so my question is has any one experienced this and if so can I still get pregnant. I am 20 with pcos. I am also tracking opks from date of first day of my period.