Here's what I'm working with.: I had a MC last week of September at 5 weeks. I considered the first day of MC as first day of my period and guessed when O might happen (if at all) and we BD on Oct 7 and 9 and then again on Oct 14. I don't do OPK, always just guess when O is according to CM. According to countdowntopregnancy, yesterday was most likely 10 DPO and implantation could have happened then. so.... yesterday and today I had some light brown spotting and I just figured AF is here since I expected it Sunday. I haven't had any spotting since about 3pm today and I have mild cramps. Negative pregnancy tests on Oct 17, 19, and today. WHAT DO YOU GUYS THINK???