I Recently Started Have Loss Of My Balance. I've Tripped

I recently started have loss of my balance. I've tripped and fallen down several times a week. My right foot isn't strong enough to walk and just kinda drags so I've fallen down and not just a stumble and recovery. I also have a severe pain in my lower back from an injury several years ago. I'm getting scheduled for removal of a disc and maybe releave a pinched nerve. But I, in the last month, have discovered that my right foot cannot raise up but my left foot can raise up. I swear that these conditions came about last November and I started having "incidents" with a semi trailer. I've been an over the road trucker since Sept. 1976 and because of having incidents (5 in a short period of time} I was let go of the trucking company I was leased to and because of these incidents (the company would call the accidents but the damage was alway related to the trailer.