Hi ladies. I've been using OPK sticks (both wilko and boots brands) for two cycles now. I had two consecutive days with a positive OPK result last cycle but this cycle I've had no positive OPK days despite now being on CD18 and my OPK control/test lines are both getting fainter now. I've taken this to mean I haven't ovulated this month. For those tracking/with experience tracking, do you have months ever where you don't ovulate? I guess I'm just wondering how normal this is.