Hey guys,
Thanks for all the help. To clarify, I'm not looking for a physiotherapist. They are trained to treat many problems, and often work closely with doctors, but I'm firstly concerned with getting a diagnosis.
To state the question again, what I'm looking for is a medical doctor who specializes (amongst other things) in identifying and treating disorders arising from muscle imbalance. This specialization does exist in North America, and is called physiatry, but I can't find anything resembling it in Switzerland. I'm sure physiotherapy will come afterwards, but you can't start on the road to recovery until you know what the problem is...
HeatherM
PS-gooner, just saw your message as I went to post this. Thanks for the info!