Hi. I am afraid you have to get a pregnancy test done at some point, the earlier the better. The morning-after pill (Plan B) is known to cause irregular bleeding after taking it; failure of the pill to work is possible, especially if not taken in a timely manner. If your pregnancy test is negative, you can safely do nothing and wait for your proper period to start. If you are indeed pregnancy, then help is easily available to get your though this rough patch. Many clinics in Singapore, including mine, are able to provide the necessary counselling and support for unplanned pregnancies. Your first step is to determine if you are indeed pregnant. So please do get a simple urine test done, either at home, or in the clinic. Everything else will fall into place thereafter.