I had considered sinusitis, since it has been an issue in the past. However, there are none of the other familiar symptoms present. Is Bell's palsy a possibility?
I don't think this is Bell's palsy. I should not give a comment unless a clinical examination is done, but from the description, I feel this is more than just the motor paralysis. Have you discussed the possibility of Bell's palsy with your Neurologist who examined you? What were his comments?
In this special Missouri Medicine report, doctors examine advances in diagnosis and treatment of this devastating and costly neurodegenerative disease.