hi its the plan b its altered your period date and it can also upset you periods its from the big dose of extra hormones you have put in your body from plan b may take a time to regulate back out. may be best you get on the bc pill this will help regulate your periods for you. suggest you see your doctor for more info if offered do keep away from depo shot far to many side effects. hope this helps you. good luck
my period is two weeks late about a month after unprotected sex i'm worried i may be pregnant. in the first week of july i had unprotected sex and started my period the next day but it was a week earlier than anticipated. i took plan b the day after starting (around 36 hours after sex) to be safe and my period continued like a normal period for around 7 days. now my period is two weeks late and i'm getting concerned i may be pregnant. two home pregnancy tests (first response brand) and a doctor's office urine test have come back negative. is it still likely that i am pregnant?