... Do I wait to start a new pack until I get my period? Last month my boyfriend and I had unprotected sex (November 3rd) he pulled out really fast while he was busting but I was scared he got some in me so 3 days later I went to planned parenthood where they gave me a plan b pill. The pill really didn't effect me and I had no side effects.I started taking the lutera birth control they gave me the next day (November 7th) it's December 1st and I'm currently on the 4th ""inactive" pink pill but I still have not started my period. Do I wait until my period comes to start a new pack? I'm also scared that the plan b possibly didn't work in the first place considering I've gained 4 pounds. Is it possible that I'm pregnant?