Misophonia is a diagnosable condition, DD 13 was formally diagnosed almost a year ago and has it very severely
You will in my experience find you are in a catch 22 situation as it generally starts between the ages of 8-12 however the only doctor who specialises in the condition (based in London) can only see adult patients!
There is a growing network of paediatric audiologists in the UK who are now trained to recognise and treat Misophonia, our audiologist at the local childrens hospital is currently treating 3 children in an area covering 250,000 people
First line treatment is with white noise generators, you can download this on ipods until you can get help
Approach your gp with caution, as a nurse with ENT experience I also realised this was my daughters problem but the gp virtually laughed in our face and said he had never heard of it and DD was just a naughty child
Educationally the Senco at school should be able to help, we sadly reached the point of suicidal thoughts and had to remove our DD for education from home as she is also visually triggered but our LEA have been very helpful and we finally have an EHC (statement) to provide an education from home
The latest research seems to place misophonia on the autistic spectrum as a severe sensory proccessing disorder, approximately 2/3rds are affected this way. Its felt the final 1/3 is made up of individuals who suffered severe ear damage due to infections in early childhood
We are currently waiting for sensory reintegration therapy and hopefully CBT but its been a long slog to get this treatment being sent round the system, through CAMHS etc