My menstral cycle has always been normal and regular, although last month and this month it has came a week early which is out of the ordinary for me. The length of days has still been the same but only having 3 weeks between cycles is making me nervous. I have been extremely tired and have been drinking more liquids then I ever remember, I have noticed what seems like a weight gain as well. I have never been pregnant and reguardless of my attempts I don't think I am able. I have been somewhat trying for two years and nothing has ever came about. When I go to my Gyno everything comes back normal. Should I be worried about something else being wrong?