On dec 14th I forgot to take my birth control. It was my second week of pills. Well I didn't remember I haven been taking then till Friday so I took Thursday and Fridays pills and have been taking them regular. On the 17th I started bleeding I guess because I missed 3 pills so my body freaked out. I have been having sex but as far as I know we have been careful. Well today is dec 25th. Last night (4am really) me and my bf had sex and he ejaculated in me so at about 4 this afternoon I went and bought the morning after pill called plan b. Should I b worried about pregnancy?