Got last periods on 11th March. Had sex on 29th April, I'm virgin my bf didn't ejaculated inside me but near vulva. Took an emergency ipill 72 within an hour. Did ultrasound test on 4th April it showed polycystic patterns. On 5th april got brown discharge lasted for 2 days. On 21st April did pregnancy test (blood and urine kit) showed negative .still didn't got periods. Took duphaston for 7 days from 6th May. Still not periods .I'm 22 I don't have thyroid problem, not over weight (46 kg). No sugar. What's the matter with me?