I Have Suffered With A Numbness/tingling In My Toes For

I have suffered with a numbness/tingling in my toes for approx 3 years. It seems to be creeping up my left leg a little and approx. 3 weeks ago I rose in the morning and felt as if I had torn a cartlidge or like in my knee. The paid from this has subsided a bit but the other morning I woke to find my Achilles was very tender and made walking difficult. This has subsided a bit. This morning may calf felt cramped and tight. Tis is all on the left leg. With toes still numb/tingle on right. I'm concerned if the right leg starts to goo I will be in real trouble.