Sir/madam, I am 23 years old. I done chocolate cyst surgery three years back, that time doctor prescribed me Duphaston tablets and now last year she recommended me dinofirst 2 mg till last month I didn't have my periods, 2nd October 1st day my periods it's get too long now 8th October 7 days, why It gets too long periods? If more than 5 days is normal? Tell me about t this?