Using opk's on clomid

Please help, what is the best way to use opk's while on clomid?? I've been using clearblue (both pink and purple) digital for many months now (not ttc yet, just to chart etc) and my ovulation is pretty regular...usually switches bk and forth between CD 11 and CD 14 every other month. I usually start testing on CD 8.

I know clomid can screw with ovulation. What/when/how is best way to use opk's with clomid?

Thanks!

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Oh just wanted to add, haven't started using clomid yet but will soon.

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