I have been having weird periods since July but my recent period has been different. My period was on November 9-13 and it was light besides two days which was a medium flow and I am usually heavy and last only four days. Since July I have been nauseated, fatigue, breast tenderness, abdominal pain, constipation, headaches, pelvic pain and no changes in weight. I have taken 3 pregnancy test(urine) in the last 3 months and they have been negative, my glucose, thyroid, cholesterol, etc are normal and when I had a abdomen ultrasound it was normal. So I am posting this hoping to get some insight or answers to what could be going on.