I know exactly how you feel and I can only make suggestions that may or may not work for you.
Avoid all sugars like the plague...no candies, no sodas, no fruit juices (except 100% apple cider), no milk, no cereal or cakes, absolutely no white sugar! Not even a teaspoon in tea...no ice cream either. Instead of sugar, use honey.
Try this and see if you begin to improve within a few days...if and I mean "if", you begin to improve...your joint pain will disappear and you will regain "most" of your energy but not all of it.
Why not give it a try.
Keep a log of everything you eat and drink, so that you can keep track of problem foods, etc.
Diagnosed with Ulcerative Colitis January 2007
Remicade, Primal Defense Ultra, Multi-vitamins (also iron, B12, Magnesium and Zinc), Flaxseed/Natures Bounty Fish Oil
Swanson Ultra Caprylic Acid (natural anti-fungal) 600mg x2 daily
Carrot & Garlic supplements (natural anti-fungal) x2 daily