3 days fever, pale, nausea, fatigue, no appetite. have had to push fluids into my 17 yr old son. he had dinner with friends friday. advice please?

Time further eval: You are at 72 hours - this is the time for a decision as you are at a fork in the road. If you feel he is getting better, albeit slowly, then carry on. However, if he really is not feeling any better yet, there are meds that can be utilized for nausea, his "tank" could be filled with some IV fluids. Don't worry about the lack of appetite yet. Does need eval for other causes of symptoms, though.