Does the plan b make your boobs grow or could i be pregnant? because i did throw up a little an hour and a half after taking the pill.

Probably not, but...: Plan B and other "morning after" pills can alter the menstrual bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex, because Plan B works most of the time, but not all the time. Plan B neither makes boobs grow nor shrink to any noticeable degree, because taking Plan B is a short-lived event.