Internet medical advice are a bad idea, but.....

Something has been eating me for the last few years. The doctors can't seem to find a cause and I'm getting desperate and tired of just taking more pain-meds as I turn into a prisoner of my own wasting meat.
So, if this sounds familiar, feel l free to share.

Extreme fatigue.
Dizziness, problems with the balance.
Memory problems. An inability to focus.
Stabbing headaches, pain in the right eye and throbbing pressure over the right side of the face and temple.
Sensitivity to light.
Irritability and mood-swings.
Pain the chest, snaking around the shoulder, neck and then down in the chest again, which doesn't really respond to movement - it just lingers there.
Occasional shortness of breath, from no remarkable activity.
(the weight loss could simply be the result of spending 99% of my free time tying to rest)

In simple terms it feels like I got very drunk while having a fever, then someone bashed me over the face with a bat and I'm trapped in the of the seconds right afterwards, stretched out for days or weeks.
I can't wake up.

The symptoms are verging on chronic. Most days, if I work one hour, I need to sleep for at least thirty minutes or risk passing out, again. (fortunately I have an understanding boss who hasn't fired me, yet)
Used to work full time. Now I fail on a regular basis to meet the quota of half-time. (like I said, I have an understanding boss)
On the rare days the symptoms ease up I can still run for nearly two hours, or work a normal full-time day without taking naps. But those days are getting fewer and further apart, and my recovery is slower.
At this rate I'll be hospitalized by 2020.

Ring any bells?