on aug the 25 i had sex on the 27 i started spotting and on the 28 i spotted also on the 29 i had a period which was light til the 5 of september my periods are usally extra heavy flow,my period was suppose to come on sept 7 but in stead i had two periods in august one on the 7 of august and the other one on the 27,then on the 17 of september i spotted for one day a pale pink spot on the tissue only when i wiped and it went away that day....okay on the 21 of september i started spotting again light pink when i wiped and some light brown it lasted for 5 days and then on the 6 and 7th day it flowed heavy with small blood clots .on the 8 day it got light without the heavy flow and my back and upper belly was in pain..i went to bed and when i woke up at 7am i was spotting and at 9 am i started spotting and at around 11am i started bleeding again with clots...i don't know whats happening .am i pregnant or what?