went to the er yesterday after a week of high temps, chest and belly pain, back pain, unable to eat and vertigo. food doesn't smell right. body pains move around and chills and sweating come and go. weak as a kitten, must have help to rise from bed. a little over a week ago i was spry and active. Heart checked good chest xray was clear ct scan of brain was good. flu test was negative. no sneezing, no coughing, no sore throat no runny nose, no difficulty breathing. just feel terrible, and very weak. what could this be?