I m 18 of age and I want to lessen my period. It usually is of 4 days and heavy to moderate till fourth day, this time its a little heavy what can I do?

The pill. In general, the best way to make periods less heavy is to take the birth control pill. The other solution is tranexamic acid (lysteda or cyklokapron). Both require a prescription from your doctor. For this period you could try Ibuprofen 600 mg 3 times a day.