I have always had regular periods, like clockwork, until 1 year ago. I missed 3 periods so I went to the doctor. She gave me medicine to make me start and I did fine until this June. I again missed a period and took the medicine to make me start. However, the medicine has not worked and I have not had a period. Last year my hormone(sp?)levels were checked, my thyroid, pelvic ultrasound, etc. Nothing was abnormal. I am 43 years old and I have a 6 year old. I am very afraid of what could be wrong. Anyone experiencing the same problems please let me know what you have found out. I am to go back to the doctor for more tests.