Jaya, please take care of yourself!

Are there any sugar-free gatorade type products? Those would probably be good for you. If you can't find any sugar free products (juice, lozenges etc) just go with what you can find. It sounds like you're going to be doing good just to take in enough calories to cover your basal metabolism.

Hope you are feeling better soon!

Edited: In case anyone read this before I edited it, I'm an idiot. Sis had rheumatic fever; so I deleted the parts that aren't germaine.