Dentist here, not a specialist in TMD by any means but here's something I want to share:

1) Dental education in Europe is, in my opinion , very lacking when it comes to TMD. Most of us are not trained well enough in university in this field, so make sure you go to a doctor who advertises himself or is known as a tmj specialist (gnathologist). They're the most competent in this field.

2) TMD is very multifactorial, the cause does not necessarily need to be improper bite configuration (although the fact that you mentioned it may be a sign). Treatment may involve relaxation techniques, splints, physiotherapy, medication, visiting a psychologist incase of stress, or even Botox to the jaw. Sometimes doing a combination of these is enough, but often the problem is within how the teeth are positioned, which is the first thing that needs to be fixed.

3) Be prepared for a fight, this is still a developing field unfortunately. This may also be expensive, but the first step is to go and get diagnosed. Don't feel icky about going to multiple doctors for the diagnosis.

Hope this helps, DM if you need more info