i took plan b around middle or end of november and got a period for december but havent got one for januarey what does this mean????

no i didnt have sex in december at all just november

Did you have unprotected sex since your last menstrual period (December)?

If you did, there is a chance that you are pregnant.

If not, then you may be experiencing a change in menstrual cycle, which is a side effect of Plan B. Your period can be later than normal, heavier or lighter than normal.

Maryann