hi!!

I have had an ongoing problem for nearly 2 years now. all day, everyday i feel tired. not my body, but my eyes. sometimes i feel like i havnt even slept and i struggle to stay awake. i have also had a stomach acid problem for the same amount of time. i have had an eye test which was fine and countless blood tests which have all come back normal. i hardly ever get headaches. it doesnt matter what i try the tiredness wont go. my eyes feel so tired that they feel sore sometimes. its horrible. i will have times in the day where my eyes feel ok and then it will just hit me!! i also have dark circles under my eyes. i am 24 years old. does any1 else have this problem?? can any1 help??