sounds like the flu...stiff/sore body parts, fever, nausea, trouble sleeping while still being exhausted, i know there is a flu strain going around where i live, dunno about you.
To whoever said the sore neck thing being related to deadly diseases...while ya, thats kinda true, but chances are he doesn't have meningitis. There are two types, bacterial and viral, one of them is deadly the other really isn't. And if he had that, whenever he stretched his neck at all he would be in excruciating pain.
You're not drunk if you can lie on the floor without holding on
(n.): Something that can be looked down on and approved of at the same time.