I am asking for a diagnosis: I fainted and threw up this morning. For some context, I took a "red-eye" from Monday evening to Tuesday morning and was exhausted most of Tuesday (yesterday). I felt extremely parched when I woke up this morning, had a headache, hypersensitive to water being hot/cold during my shower this morning, hypersensitive to the sweetness of (fake) apple juice and could only eat a few bites during breakfast (about a bite of sausage and one or two bites of french toast; usually I have three sausages and a slice of french toast for breakfast). My voice was gone this morning and I spat out a lot of phlegm after brushing my teeth this morning. Before fainting, I was sitting down, had labored breathing and was disoriented (the same sort as when I stand up too quickly after sitting or laying down a long time). After coming to (I'm told I was out for less than a minute) I saw that I had thrown up somewhat on the floor and on the table, I had a cold sweat, and I then threw up twice more within five minutes of coming to. I then went back to my room, drank water, ate some saltine crackers and was in bed for most of the day. I ate a normal dinner and feel mostly better now but have a slightly sore throat and occasional cough. Do you think I have the flu or something more serious?