Ovidrel

Alexis
Hey Ladies,
Have any of you used Ovidrel before? It's an ovulation trigger shot. My doctor had me taking femara this cycle along with the Ovidrel trigger shot. I heard that Ovidrel can stay in your system for a long time and will give you a false positive. I had the Ovidrel shot on November 27 and today I took a test and I got a faint positive. Do you think it's a true positive or do you think the Ovidrel is still in my system?