Missed period and not sexually active

Patient: I got my period when i was 12 and am now 20. my periods always fluctuate and can occur from 2 weeks to 3 months at most. its now been 4 months since my last period, i am a virgin and have not have any change to weight, or diet. should i be concerned about this?

Doctor: Yes you need to visit your doctor who will carry out a few tests…blood tests and an Ultrasound exam. If you are overw eight you could be suffering from a condition called PCOD . Don’t worry it is treatable but requires some lifestyle changes and possibly regular medication.