my girlfriend took plan b the next day we had sex because the condom broke.. she had her period about a week prior. she got her period for 2 days n she got sick from babysitting. (she thinks) the lil boys mother said he was sick. so she threw up nausea and diarrhea. for about 2 days now .. n still isnt feeling 100% could she be pregnant , or is that impossible because she got a small period