missing period

so i’ve have pcos so i’ve missed my period for like a year before. this is my first relationship and the first one i’ve ever had sex with, we usually use a condom but now we start raw then first with a condom, thing is before the first time we did that I had already missed my period by 2 weeks, now I’ve taken two pregnancy tests both say not pregnant, I think it may be my pcos and the fact that my fat percentage might have risen since i haven’t been as consistent on working out. I don’t know. anyone ever had a similar experience