Such a weird cycle and this never happens to me. I got my blazing positive opk on the 12th. On the 13th it was still positive but not blazing. 14th and everyday after that it has been negative. I also take “proov” tests for a secondary confirmation on ovulation and it was positive on the 18th. Theoretically it wouldn’t show positive unless you have ovulated. I also took it on Sunday and Monday and they were both positive too! FF never gave me crosshairs. So not sure which day is it but anyways here is my chart