Extreme Constant Tiredness and Never ending thirst Not Diabetes?

Hi so I've been worried recently as I thought I had diabetes but I had a blood test and got the results today so everything is fine urine and blood everything functions properly and this has been going on for years and basically

I'm always everyday and every hour and minute I'm always tired and here we go it don't matter what time I goto sleep I can go as early as 7pm or 2am I'm always tired never ending no matter he time I go

So if I'm not diabetic only thing I can literally think of is eye strain because I use the computer every hour of the day or because I need glasses yes I do need them but I ain't got any but all this I wouldn't of though it would make me and I mean this I feel like I need to goto sleep urgently because my eyes hurt so much and I'm so tired I have to close my eyes every half hour and hold them shut cuz I'm so tied

And thirst well it's very strange so let me say it's worse when I'm out so like I'm always feeling thirst like all the time near enough however at home not as much but still always as but when I'm out I feel like I could drink unlimited gallons of water and it don't matter if it's cold weather snowing hot don't matter still feel same

So what's going on ?

As I said maybe eye strain from computer as I go on it every day and I need glasses but I ain't got any but like would this really cause this extreme tiredness and eye hurts ?

Thirst I really don't know if I'm not diabetic I don't know what's going on

I have been like this for years. Had tests for diabetes nothing showed up. They also say thyroid but mine is ok, maybe ask your doctor to check it out. Hope you find out, if you do let us know

Hello there ! Did the Doctor include Thyroid fuction test in your blood test . You might have hypothyroidism ? How about your Full blood count ? to check if your not having anaemia that's make you tired and sleepy . How about your diet ? Well , kindly check all this things it contribute for making you

not to function fully .