At the age of 16 I started my period which lasted for 2 days. Now I'm 19 and haven't had one since. Is something wrong?

You won't get an answer here because we can't diagnose on line and no nothing about your medical history, but why did you not contact a doctor after you realized that you were not menstruating. You need to see your doctor for a referral to a specialist to determine why you haven't menstruated for what, four years !

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