I had unprotected, one day gap in April during the fertile window as flo suggested. My regular cycle was 30 to 33 days. It was pretty regular, every month, no other issue. I had a
thyroid test in Feb and it was normal. But the month I tried for the first time, my period was late. Before my proposed period day of May, I had cramps and wet feelings. But both were gone. Then I waited and it seemed like I was
pregnant. I was excited. After 12 days, I tested on the 12th of May morning at 5 am it was negative. To my surprise the period also came within one hour. So the period came on the 43th day. It never happened before. What could be the reason? Please tell. I tried again this month. Let's see.