I have similar problems in my left foot and lower leg ( i only have a left leg!) and there is not much that we can do about the numbness, that leg is also weaker than it used to be and i have a bit of foot drop ( an AFO helps that). I also have RSD, and knowing the insidious nature of the condition, i suspect that that is likely to be having an impact too- do you have any of the skin changes, nail changes etc that go with RSD?? Lyrica has helped me deal with the RSD, its not perfect but it is an improvement