Hi, I am 20 years old, 5.2 height and 7 and a 1/2 stone. I have always been fit and well, I eat a healthy balanced diet, three meals per day, fish, vegetables etc. and exercise regularly. Recently I've been constantly tired, with no energy and a fuzzy head. It is extremely frustrating as I have uni work that I need to get done and it's really affecting my ability to do it. I feel like I can't concentrate to do it because all I want to do is sleep and my brain won't focus to let me get on with it. Have you any idea why I am feeling like this and/or what I could do to get back to normal?