"took plan b back in december after unprotected sex and got my period a week later, which was also around the time i should&#039;ve normally gotten it. it was kind of heavy and lasted 5 days, which is normal for me. well i had unprotected sex again in january and had what i think was a period 2 weeks after. it was just really light in flow and was more brown than red and it lasted 8 days. now i&#039;m waiting on my next period which is now 21 days late. i&#039;m cramping, bloated, nauseated and even have thrown up once and had diarrhea. i&#039;ve taken 2 tests and both came out negative so i have no choice but to continue playing this waiting game i guess. needless to say, plan b works but its side effects are horrible."