my period is 6 days late, i have a VERY regular 28 day cycle never miss never late never early. My last period start date was aug.20 and i was due to start sep.18. yesterday sep.23 i went pee wiped and saw some light red blood so assumed i was to start my period finally, put a pad and hours later there was nothin but a small light stain of blood. when i wiped though there was more blood as if to be on my period. now today sep.24 i woke up and had a gush of dark red blood as i peed and wiped. later throughout the day i still had dark red blood when wiping but not when peeing and it doesnt leak on to my pad. ive never experienced a period like this! its so off and i have no crampin except for maybe a few small dull jabs in the center of my pelvic area. I keep reading about implantation bleeding but in my circumstances i dont know how to compare so what could be going on?!?! help please im so stressed on whether or not i could be pregnant. P.S. i had unprotected sex the 14, 15 ,16,and 21st of sep.all the weekend before i was expecting my period, and then a few days after i missed.