Loss of appetite for a week.nausea most if the day..feeling very lethargic.sensitive to smells?

Sounds like: early symptoms of a viral infection..drink plenty of fluids(try saltine crackers for the nausea, get plenty of rest DON'T "PUSH YOURSELF"..and check your Body Temperature in AM before you eat/drink.. If symptoms continue for another week...a face to face visit with your Primary Care Provider is indicated! Hope this is helpful Dr Z