Usually use condom but we didnt. I took my pill that night after sex. The next night i missed taking my pill as i was out. So that morning i took plan b. That night i got sick sick with a fever and puked turns out i have tonsilitis. FREAKING out that plan b will not work now. The one time i say yes to my boyfriend i am kicking myself now. Did i throw up plan b? I am also now on penicillin for my tonsilitis would that effect plan b.