Hi, my 4 year old has a stomach virus, she began with fever on Friday and started throwing up that night and complaint of stomach ache, I called her doctor and she said that it was a stomach virus. She vomited Saturday at 2 am and vomited some bold, the doc said she must have ruptured a capillary, she continues with fever and stomach pain, now she complains of bilateral knee pain, today is Monday and she still has fever 102.4F, she is no longer vomiting though. Could this be appendicitis?