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i'm 18 and i've been with my boyfriend for almost a year now, and i've been on birth control that whole time too. however, last week i was trying to "restart" my birth control package, because i wanted to have it start on a sunday instead of friday. so after the week of sugar pills i was planning on just waiting till sunday to start taking them again. by sunday though, i'd forgotten i needed to take them...it wasn't until tuesday that i remembered, at which point i took 3 all at once (sunday, monday, and tuesday - although technically friday, saturday and sunday). i puked the next morning, probably because of an overdose. then on friday, my boyfriend and i had s_x...we used a condom. the other factor is that i had also started taking an antibiotic on wednesday, because i was sick. by the time we had s_x, i was at about day 12 of my cycle. this week i've had really sore and itchy nipples, i've been waking up randomly in the middle of the night and not being able to fall asleep again, and just this morning i felt a little nauseous. should i be worried about being pregnant?