HELP! My cheap OPKs keep looking POSITIVE!!

[mummy_blues]

Ok, I ovulated on the 15 th MARCH, very very certain 99% because of Clearblue digital OPK which is very accurate.
I tested yesterday and this morning with first morning u, and my cheapish OPKs from the drugstore keeps giving me two dark lines with are darker today than yesterday!!
What is happening? Clearblue digital OPK does not show a smiley, only the OPKs give two dark lines....
HELP!!

https://img43.imageshack.us/img43/8813/img5432x.jpg

 

[camerashy]

hi are u 10dpo ??? if so id say thats hinting a bfp on the way!!! good luck

 

[mummy_blues]

Hiya, I think I might be at dpo 10, can't be too sure cause there is a 24-48 hour space between my OPK positive. I got my Smiley on the 15th lunch time, so I think I must have ovulated the day after that.... will test again this weekend with a proper HPT and try to hold out until then. Thanks!

 

[AP]

I was always told that when you get the first positive OPK, stop testing for that month?