Hi its feamle 22 years, normally my periods last for the end of the day 4 or sometimes till the 5th days morning but this time its different there was nothing on the 5th day but suddenly it started heavy bleeding with enormous pain on 6th day and this bleeding is bit different from regular bleeding the flow is a mixed with some blood clots and the situation is not improving eve today(day 7) please help me wether its normal or anything serious and what should I do........