This was in essence my first symptom I started experiencing when I started becoming my health anxious. It was really frightening, and I felt the same sensations as you do now. I went to my GP twice, and ENT twice, a neurologist, an eye doctor, and an endocronologist and everything was clear. It's anxiety trust me. I still get the sensation occasionally but definitely not as much as I used to. It used to drive me absolutely crazy but it was only anxiety, because once I started focusing on a new symptom the sensation went away.