I have been having a lightheaded/dizzy/swimmy headed feeling for several months. It is not every day, not all day (some days are better than others, no headache. Went to ENT, not vertigo, no inner ear issues. Went to eye doctor, eyes are fine, no changes. I was prescribed anti vert, no relief. Was told to take Zyrtec, which I am currently taking, but still no relief