Had my second <a href="https://glowing.com/glow-fertility-program">IUI</a> done on 9/22. My periods are typically regular, 26/27 day cycle. Yesterday at 12dpo I started having some very light spotting, only when I wiped. I had nothing this morning until about 3 hours after I woke up, just some more light spotting. Could this be later implantation? Or could it be my period starting?