I m 21 years old 5ft 4 in. 60 kg. i used to get periods earlier but now i dont get periods at all.?

recently i had taken an i-pill as one of my friend said it is a gud way to check if u have become sterile or not. i got my periods within 5 days after popping the pill. should i see a doctor. plzzzzzzzzzz help i m virgin