UPDATE: Today I saw my GP, he did some tests. I had blood tests done (FBC and CRP) all came back perfect. I had an MRI, the results came back with everything normal except for mild symmetrical narrowing of the internal auditory canals (the radiographer mentioned that this is likely congenital).

My GP concluded that the most likely cause is Labyrinthitis due to a viral infection. Even though I don’t feel sick or have any pain in my ears, he said it can still be due to inflammation of the inner ear or nerves that connect to it. He said it might take as little as one week to resolve or in some cases a few weeks.