Hello,
I've just started using opk too and need some advice as I don't have a clue what's going on!
My average cycle (according to period tracker is 18 days). I started my cycle on 18th Nov and on 23rd Nov which was CD6 I got a peak fertility (using clearblue dual hormone). I stopped using the opk as I thought my fertile window was over and decided to wait for my cycle on 6th December . However on 30th Nov and 1st Dec CDs 13/14 I had EWCM.
6th Dec (CD 19) no sign of period. As period tracker stAted I would be in my fertile window from 8th Dec (now become CD21), I began using the OPKs again from the 9th. So 9th-11th (CD22-24) low fertility but 12/13th (CD25-26) showing high fertility
I really don't know what's going on! Any suggestions greatly appreciated and sorry for the long post!!