I am undergoing fertility treatments and had my last egg retrieval 3/23, followed by the start of my period on 3/30. I have not had an embryo transfer, and had 2 days of light spotting with mild clotting on day 19 and 20. On day 21 I tested positive for ovulation with a home test. My cycles are typically 25 days. Should I be concerned? The plan is for me to have an embryo transfer after my next period.