Like journey said, the ovidrel shot will actually cause the OPKs to be positive, since HCG is structurally very similar to LH. So in general, once you've taken the trigger, there's no need to keep using OPKs. As for the pregnancy test, if you want to be safe, you should wait until your period is late...but of course, most of us are not that patient :-) I'd say, wait until you're at least 12 dpo, which means about 13-14 days after taking the ovidrel shot. Best of luck!
I was told that after taking the trigger it would be + because it searches for the same thing. I really can't explain it. But they said the preggo home in the trigger shows pos like the lh. Does that make any sense to you. Maybe you should bd the weekend to cover all ends. Good luck. SSBD:D