Suggest Treatment For Irregular Periods

Respected Doctor,She was having irregular periods for the last 2 months. Infact her last period continued for 10 days( 18th november to 27th november).For the first 4 days her period was normal.But from 5th day onwards there was huge discharge of blood.So the gyne had advised her to take deviry 10 mg course for 10 days.Her deviry course was completed on 6th december.her next period started on 12th december in the evening.Till 16th december the period was normal.but from 17th december in the evening there was little more discharge of blood. so we are very worried.plzzz advice ThanksMr. Nandy