This response has a potential solution to this problem.

I exhibited all the same symptoms as described by many of the responses here. It started a week ago and I lost all confidence in my left foot - specially when transitioning from carpet to cement or wood. Or from dry cement to wet cement. The sensation would occur multiple times a day.

I took Methyl B12 shot, and it completely alleviated the problem. There are various places in major cities in the US where you can get a shot for $40 to $50. Taking the pills are not as effective as an injection. It appears there are also sites that provide you the information and Methyl B12 to give yourself the shot. You can also ask your doctor for a B12 shot.