Left foot numb once a month?

I had a really bad back injury back in 98. i recovered fairly well .My left leg doesnt sit properly into the joint.slight limp when tired.Other then that no real problem.Except during my period. my foot really bothers me , like it feels swollen.It seems to have gotten slightly worse since being diagnosed with diabetes. which is under control.I have sensitivity in my feet . so I know the diabeties hasnt effected too much the circulation.no pins and needles .I was caught early in my diagnoses.Anything i can do to make my foot not feel so heavy and troublesome.In a day or 2 ill be back to normal.its very frustrating .