I personally would say keep on eye on it and if it seems to get more severe as the months pass them I would defiantly seek the advice of a doctor - but over all (as a female) I think this may just be the cycle of a woman - some times it is slow and short and at other time it is heavy and long...... my period changes from month to month and my doctors says that is normal for many things/events/emotions in life effects the cycle of a woman.