Positive pregnancy test before egg retrieval

Hello all, I’m currently doing an <a href="https://glowing.com/glow-fertility-program">IVF</a> cycle and should be going for my retrieval next week however something told me to test and long and behold there was a bfp, however I am taking several medications for stimulation such as menopur & follistim. I did contact my REÍ doctor and informed him what’s going on and they’re going to do bloodwork to confirm and see if my numbers are doubling. Apparently, Menopur can cause false positives. Just wondering if this has happened to anybody before? Thanks so much in advance.