In december i had unprotected sex used "pull out method" i was not on birth control. about 15 days ago i had sex again and started spotting shortly after so i assumed it was my period so i went and refilled my birth control and started taking it. I still have not had a regular period since December, it was only little spotting and cramping. it only lasted about 2 days ( January 13th or so I usually start on the 26th of each month) . We are now in Feb and have yet to get a regular period. My other issue, 5 days after having started the pill i had sex again and did not pull out. Is the birth control pill affective that soon?? Should I be worried about being PG? Please help. any input is appreciated.