I am a 23 year old girl. I had sex on 26 march and he did not ejaculated inside me. I got my periods on 29 march which was my due date. It lasted for three days one day short than normal. This month I was late I did a hpt on 5 may which was negative. I took norlut n for 5 days from 6 may. Now after stopping it I have severe acidity and nausea and slight heaviness in the chest and still no period. Kindly advise.