D has thrown up 5x in the past 3 hours. No diarrhea, and no fever, but his temp is rising (97.4 at 8, now at 9:20 it was 99.1). He's becoming more listless, though that could just be from exhaustion. He barely ate today. He's asking for water, and we're allowing small sips, but he can't even keep that down. This is our first stomach bug/GI sickness. I did call the ped line, but out could take up to an hour to get a call back. At what point do I need to worry about how much he's throwing up?