[user104658]

If you feel like a GP can deal with your ailment then you probably don't need to see anyone at all. People go to gps for every sniffle or cough, it's pathetic.

If it's an emergency, go to hospital. Otherwise, make an appointment for 2 or 3 weeks time, give your body a chance to do its job and heal itself, if it does (it probably will) then cancel the appointment. If not, then go at the time you booked.