I'd say the reason you gained rather than lost weight is because you were eating a "huge amount of protein and fat.".

It's never going to be possible to lose weight on any sort of diet while eating huge amounts of food.

The reason for the thirst is much simpler: ketosis. Plus, the more you drink while in ketosis, the thirstier you feel, so i think you'd have been better off eating some higher carb vegies.

So, what to do next? Me, i would start over, but on a set plan, one that will give you solid advice about what is best to eat. I know Atkins is considered old hat to some these days, but it worked for me. And if you look under "Plans"on the top green menu bar you'll find summaries of quite a few other plans.