This same thing pretty much happened to my daughter back in 2012. She had a terrible stomach ache for a few days. It was awful. After the second or third day I knew something was wrong so I took her to the ER. They made her wait hours while she was throwing up everywhere. We finally gave up and went home because no one seemed to be taking it seriously. We lasted barely an hour when we got back home. I decided to take her back in to ER and march her up there and demand for her to be seen and I mentioned the word 'appendicitis'. As soon as I did that, they rushed her back. Sure enough, they ran some tests and what not and found that her appendix was punctured and was only a few hours away from poisoning her body fatally. She went through surgery and all went well, but it was a terrible time for me as a mom and especially for the unnecessary pain she had to go through because the hospital wouldn't do anything at first.