Possibly a combination of both?
Both of my parents, my sister and my nephew all had the same thing, but neither of them had it as bad as me.
My mother felt nauseous, but neither of them actually threw-up, and they all felt very weak, but they never claimed not to be able to simply roll over.
Pushing myself out of bed was very difficult when I had to throw-up again, and nearly impossible when I first got back into bed.
And although I feel better now, my appetite still isn't where it used to be. After this morning's breakfast and about 16 oz. of water I still only weigh 181 pounds.
I was up to 188 before I got sick, but that was the most I ever weighed so it's not like my body is used to being at that weight.
I think I still have some pedialite left over from when my daughter needed it. It couldn't hurt since I had a lot of liquids coming out of places that liquid just shouldn't come out of.