Doctors ...
Doctors in Belgium are very good and will even come to your house if there is a problem. You can find the local doctor on call by calling the local “Wacht Deinst” number if it is an urgent need. You can ask local riders and racers if they know someone who works with cyclists (a regular doctor, not THAT kind of doctor) and use them. These doctors know what you can and can not have as a rider if you need medication for a cold or problem, plus the generally are cheaper than other doctors.
The local "streetkrant" or municipality website will have a listing for the "Wacht Dienst" number so you can contact a doctor.