Hi there, I m curious what might be going on. about 1.5 weeks ago I had what I thought to be food poisoning or a stomach flu. all the typical symptoms were present. diarrhea, back ache, head ache, severe fatigue, no appetite. Then after a couple days of that, for the last week I ve been very tired, have no appetite, can t seem to sleep enough, and heartburn is very bad. Could this have been a stomach flu or food poisoning still affecting me now?