Most importantly, don’t panic.
This is the hardest thing. When your child is in serious pain or when you are caught totally off guard, it’s easy to freak out, but that’s the worst thing you could do. Do your best to remain calm throughout the whole process, that will help you make the smartest decisions and truly help the person in pain. Overreacting leads to panic, frustration, and fear. None of those emotions are helpful in a dental emergency. Stay calm and find a dentist!