Can you drink any of the Gator Ades or the products with electrolytes in them, even the Pedialyte?
If you can get the K+ (Potassium) up you will feel better.
With a potassium level that low you may end up needing IV treatment. Keep a close eye on this- if your potassium gets too low it can effect your muscles ability to contract, including your heart. Potatoes are an even better source than bananas. Try them plain mashed. They worked pretty well for me when I was really sick this summer.
Hope you feel better soon!