I had sex last week using pull out method and he didn't cum inside of me. Yesterday, we had sex with a condom; however, it BROKE. I was terrified so we went to nearest CVS to pick up a plan b pill. Pharmacy was closed and by the time we got to a 24 hour pharmacy, 3 hours had gone by. So I took the plan b pill 3 hours after we had sex when the condom broke. My period is due in a few days so should it be coming or will this one be missed because of the pill? When will I know if it's effective or not?! I'm so scared and I absolutely do not want to get pregnant as I am only 19.