Yeah, Ovidrel is actually HCG, the same hormone your body produced during pregnancy. So a pregnancy test taken before the shot has gone through your system will turn out positive. I think they suggest waiting 10 days after the shot before testing.
Best of luck to you! I hope it's a BFP!!!
It could be a false positive. I would wait for 6/4. But don't get down, it could be a true postiive as well.