I need help ASAP. I'm paranoid about the stomach virus and my child spit up earlier, it wasnt really…

I need help ASAP. I'm paranoid about the stomach virus and my child spit up earlier, it wasnt really more than normal but it was clear and white and smelled really really sour, almost like adult vomit. It had been a few hours since she last ate. Doctor said it doesn't sound like she has a virus but I'm still a little worried.