i started taking birth control pills last month on the 17 for the first time and stoped in the midle of my pack.I also had unprotected sex with in that time.i started bleeding from stoping the pill and the week my period was due i spotted it was like i would wipe and it would be pink it happened only once or twice.i recieved my period a week after that.doe s any one know if that was implantation or a sign of pregnancy?