My periods was delayed by 20 days and after taking the norgest tablet for a duration of 5 days (10 tablets), I got my periods where the flow was high only on the first day, moderate on the second day and very light on the third day. Ultrasound was taken before periods and found no abnormalities (like PCOD). My periods used to be regular usually but why did this happen this time? Should I worry about little less periods? Is this anything related to pregnancy? All UPTs were negative before the period. Today is the third day.