Talk to Gastroenterologist on Conception

Aoa doctors, I have been married for 9 months now and have been trying to conceive even since marriage, but I have irregular periods. My weight is 64 kgs, height is 5'6.have been taking duphaston for 3 months, it regulated my cycle but this month period came for only 1 day, and vanished. It has never happened before. Urine tests were negative. I have taken thyroid test, ultra sounds, fsh and lh tests, all were normal. Doc said nothing is wrong with me but I'm extremely worried