I'm no expert in anything, but I know that you're drinking TOO MUCH water. For your body weight, you should be drinking no more than 50 ounces of water a day (a quart and a half, six 8 ounce cups). Of course that's just an average, maybe 60 ounces for any exertion in a hot climate, but certainly not 10 cups (you unecessarily wash out too many nutrients from your body).
It can also cause a mineral deficiency or imbalance.
Right now, your body uses a lot of energy in digesting solid food that might be better used in healing, proper functioning (metabolism) and weight gain. Vegetable juice would give you the same nutrition as vegetables, but your body would not have to DIGEST (metabolism) the solid food.
Consider making your food choices more tasty and flavorful. Since they would be more satisfying, you wouldn't be so thirsty all of the time. It is not normal that you are thirsty all the time,...dry skin?
Digestive enzymes will help normalize digestion of what you do eat and will also help your body digest oils.
Background info on digestion here.