I have had extremely regular periods for years , 28 day cycles every time , period lasting about 5 days. I have no idea when I ovulate because I am not actively ttc.
Before you tell me it’s impossible, my family is very fertile and my mother got pregnant with 4 children on the pill. Having regular periods ( or at least period like bleeding) while pregnant is also frequent in my family. I had a period 7/28 - 8/1 I had unprotected sex on 8/4 , 8/11, 8/20, 8/30, and 8/31 I got a little lighter than normal period 8/25 - 8/28 and it ended. Well a week later 9/3 - 9/5 I have been having light pink and super light brown discharge when I wipe. Just a few super lights drops in my underwear also. I’ve been having light cramping very similar to period cramping. And my lower back has been aching , I haven’t had an appetite and have been a little tired lately. I never have spotting between periods , what could cause this other than implantation??