I took plan b last friday, dec 4. i last recieved my period the day before thanksgiving. i had light discharge and today im bleeding. am i pregnant?

Maybe not, but...: A morning-after pill can alter a cycle or two. Also, many women have occasional variation in their periods, some spotting between periods, a heavier or a lighter period, or even a missed period. Having one or two of these symptoms doesn’t necessarily mean there is a medical problem. One should check a home pregnancy test 3 weeks after taking a morning-after pill, to make sure the pill worked.