You don't have to worry about this. The consultation office, triage desk, service desk and registration office of the hospital can all consult on the spot, and they will help you solve it.
3. No matter which department you hang, if it is not symptomatic at that time, you can also turn the number across departments, or you can go to the registration office to return the number and hang a number again. These are free. Anyway, I only charge you a number, so you don't have to worry about it.
You'd better stop drinking water on the day you go to see a doctor, or you won't be able to do some tests and you will have to come back the next day. It's very troublesome!
I hope I can help you.