I took a plan b pill 3 days ago and i was a little late in taking it. (i did take it within the 72 hour time frame but closer to the end rather than as soon as possible) i felt fine up until now im starting to experience some mild nausea. which is one of the side effects of the pill but i feel like 3 days after taking it is a bit too long for it to be from the pill? im worried now that it didnt work and im pregnant. my period is due in 11 days according to glow's prediction. how soon can i test? or should I wait until i miss my period if i do?