My MC was really early, 4 weeks and 3 days. The day before, the day of, and the day after AF was due I got a positive BFPs, that night (Monday, the day after AF was due) I started spotting and by Tuesday morning I had what looked like a normal AF but with nausea and painful cramping. I don't know about other people but my AF has been the same length, and the last two days I have been spotting just like I have in my other normal cycles...except for the cramping and nausea. I'm seriously wonder if those were all false positives. I don't know if any of what I just typed helps but I hope AF shows up for you soon. I'm very sorry for your lose