Just ran across your post. There is a condition, usually encounted by athletes, where they drink too much water. Hyponatremia ... It dilutes the salt content in the body and can cause symptoms similar to dehydration. In extreme cases, again with athletes, it can cause seizures, coma, and worse. So, yes, you can drink too much water. I think the message is to drink more than you did before hCG, but don't drown in excess. My doctor always says the more yellow your pee, the more hydration you need. I use that as my guide.