Suggest Treatment For Vertigo With Shivering In Legs

hello,my problem is that i am facing vertigo for the past three years. but i feel it whenever i walk, specially in wide areas. my legs start shivering, and i cannot even stand still alone while i am in a wide area where i cannot find any thing to hold.during sitting position i dont feel vertigo. according to doctors i do not have any ear problem.can you help me please