Me and my husband had unprotected sex exactly at the 7 the day of my first birth control pack, so just wanted to get some info on how high are probability of getting pregnant, and how would I be able to tell, I know that in some cases it's normal to miss a period of its the begging of birth control pack, so I can't rely on my period to let me know if I am pregnant. Just thought I can get some input since I just got back to using birth control again.