Hi ladies, sorry me again! Full of questions this month Haha. Some info. I'm a 27 day cycle and after failing to conceive for a year started opks last month. Ovulated day 14 so a day or so later than app calculations. I'm now on day 15 this month and still no surge which is concerning me a little as it's now pushed my expected period back. I'm never late on my period. I'm booked in to have my first fertility blood test on cd21 to check progesterone levels so I'm worried that not having my surge yet could affect blood test. Anyone got any advice?