Darkeros, you're going through a lot! I hope your doctors can help you sooner not later. In the meantime, to help with hydration, definitely drink as much as you can handle. A person in good health should drink approx 1 litre (approx 1 quart) of water for every 50 pounds of body weight per day. Since you're having trouble with hydration you may want to take in even more. Increase slowly to get used to it. In the meantime, you may also want to increase the electrolytes in your water. Elete Electrolyte drops are an excellent solution - they have no taste, colour, or odour, and add essential electrolytes to keep your energy and hydration up. It works for me!

Hugs and butterflies,
~T~