despite being on 2 types of birthcontrol(as prescribed by doctor) i had a pregnancy scare early october. my period was a week late. but when it came it was really heavy and a little longer than usual. everything was normal up until now. i have had light bleeding on and off for about a month now. what could be going on? has anyone else had this happen? i really need answers and i wanted to see if anyone had any before going to the doctor.