My dog is drinking way to much water to the point that he is vometing but he isnt eating!!. and I don't mean a he's only eatting a little bit here and there he hasn't been eating at all and I know its not the dog food because he was eating just fine 2 days ago I have no idea what to do to make him eat any ideas??

Better to take him to the vets NOW rather than wait..

If your dog is not eating, and can't even hold down water, then this is an emergency. You need to get him to the vet right away. He may not starve after 2 days of not eating, but after 2 days of not being able to keep down water, he could very well die of dehydration, and it happens very quickly.

You need to find out what's causing him to vomit, and what's cause his disinterest in food. VET! NOW!

My first guess would be bloat... Or an obstruction.