Stomach bug?

So Cheyenne isn't feeling well....again. She woke up in the middle of the night last night in vomit and continued to throughout the night as well as today. She hasn't been able to keep anything down and we've just given her pedialtye and crackers. The nurse from her doctor's office told me that she's probably got a stomach bug. Chey has not a fever throughout all this. Her temperature is normal. She was feeling better this afternoon so we went to mom and dad's for a while to watch the superbowl. Well, a little while into it and she was at it again. I feel so bad for her. She's asleep now...with nothing in her stomach but about a teaspoon of pedialtye. Hopefully she'll have a better night and feel better in the morning. I'm supposed to have an ultrasound tomorrow morning but we'll have to see how Cheyenne's feeling before we try to head out. Say a little prayer for her.