Hi im a healthy 19 year old woman. for the last couple of weeks ive been feeling very light headed, shaky, nauseous, vomiting, hot flashes but no fever or hot to touch, loss of appetite. Every time I got to eat something I get a sick feeling. Ive been going through some health problems but waiting a long 8wks for my tests to come back. Can you give me some advice on whats wrong with me?