After taking postino 2 your period might be different. Most women will have a normal period at the expected time, but some may have their period later or earlier than normal. You might also have some irregular bleeding or spotting until your next period. If your period is more than 5 days late or is unusually light or unusually heavy, or especially painful, you should contact your doctor, nurse or pharmacist as soon as possible.
You might have tender breasts, headaches, lower abdominal (tummy) pain, diarrhoea, feel dizzy or feel tired after taking this medicine. These symptoms should get better within a few days. If the symptoms do not go away or get worse, you should contact your doctor, nurse or pharmacist without delay.
If you think that this medicine has affected you in any other way that is not mentioned above, tell your doctor, nurse, pharmacist, or family planning clinic.

Found answer on the net. Hope it helps.
AR123