Hi. About 3 days ago I had (i think) a virus that caused me to have a headache, VERY bad nausea and vomiting, and diarrhea.. Now, (and for the past 2 days) I haven't been able to eat or drink much due to the horrible nausea that won't go away,diarrhea still and when i belch it tastes really bad... kind of like what tar smells like (does that make any sense?). I am 26, female, not pregnant, non-smoker, non-drinker, etc. What could this be and should i be worried?????? If you need more info, please let me know. Thanks!!