What Causes Imbalance During Walking?

I have under a test for inner ear equilibrium test and found some imbalance in it,and I am taking medication since a month, vertical 8 mg,and vitamin b12 tables, but I still find difficult to walk freely and feel like I am standing on a lift or on an unbalanced slab,is it due to anxiety, I have seen neurology doctor, but they find nothing. How can I be normal, please advise. Thanks.