Welcome to HCM Forum,
I can understand how shocked you must have felt after knowing that nothing wrong as dermatologically.
Its important that if you feel that chances that doctor might missed finding you can have another doctors opinion.
If after another consultation same findings comes out then there is possibility that you might be suffering Mono delusional disorder
(characterized by having sensation which are true and real one for you but not collaborated with other people finding. This happens because of some neurochemical changes in brain which alters yours perception -sensations)
In such condition antipsychotic
medicine will help - which corrects mentioned neurotransmitter
changes.Medicine takes prolonged time to control your problem - that might create doubt again that its not getting cured - remember u will require treatments for many years.
So then continue regular follow up and treatment as advised by your psychiatrist
Hope it helps.Best regards.