Sorry to hear that......have you the sickness and diarohea (sp)? I think LT would say you need to come off it to get your body fighting. As you know, you are only consuming a small amount of calories, and maybe your body needs to be in tip top condition to fight the bugger bug...I really dont know.
You know, if you feel you need to, try and do the refeed maybe, and limit any damage, but the most imortant thing right now is to get yourself 100% better.
I do hope someone else is able to help you further.
Keep drinking lots of fluids so you dont get to dehydrated.