Thanks for your query
I think your disease is confined to external ear. Wax is a cause of your symptoms though it has been excluded by your doc. Fungal external otitis
media is another cause which may lead to same symptoms. Fo that -
1. you need to consult your doctors,
2. ask him to clean your ear canal
3. maintain local hygiene,
4. use a topical antifungal
5. bathe in clear water,
6. use antihistaminics if itching is unbearable.
I think you will be helpful with this advice.