Clomid and opk help please

Jo

Hi all. Thanks for reading. I've done a few rounds of clomid now and ovulate.

Thing is normally I get a positive opk cd 16 by cd17 afternoon they are then negative

This month I've had the strongest ever opk's the lines are even darker than the control (which never had darker before) and this is the 3rd day of positive opk (darker than control) still on day 3!

Why am I getting positive opk's 3 days in a row when normally just 1??