I have been suffering severe headache from past month with blurry vision. It had occurred thrice and I feel pounding sensation in my head during the stroke. Last time I felt terrible pain on left side of my head, left eye and left for head. I took migraine meds and it subsided. Also lately I feel hissing sound in my ear . I checked it with ent and he said it is because of the vacuum channel being created on the inside of ear. Can someone please suggest which doctor should I go to? I am living in Hyderabad.