Okay is it implantation bleeding or light period? I had sex on decemeber 18.. I started to bleed 21 but very light and stopped on 27. Sometimes it would bleed at times and then it would bleed a lot than I thought but superrrr light to the ones I’m used to. I just thought it was spotting at first but i remember I did stain my underwear a lot and not a dot. However AGAIN NOT HEAVY. I checked for holes on the condom there wasn’t any holes. I heard gaining weight can affect the period flow and I have gain weight a few pounds like 5 or 6.. someone help!!!! OH YEAH BTW I GET ANXIETY EVERY TIME AFTER SEX... help...