I have PCOS so random cycles. I would be coming into my fertile window if it was a 28 day cycle (normally 35+ but occasionally its less). My OPK are still negative (a very very faint line) but I have just randomly had EWCM. Does this come before ovulation, during or after? We have been trying for 2 years but I have only recently started trying to work out when my fertile window is so it's all quite new to me!