What Causes Feet And Legs Pricking Sensation Up To The Waist?

Hi, may I answer your health queries right now ? Please type your query here...Hi i started getting pins and needles sensations in my feet and legs. after walking a couple feet it would get more intense traveling to my waiste making it difficult to continue. eventually it would fade away. One doctor told me it was a pinched nerve but the medication never worked. Then i went to another who after experiencing a terrible pain at the left side on my back suggested i must have passed a kidney stone. A herbalist diagnosed that blood is not passing through the kidneys. I got a bit of ease but i am not yet my normal self. I'm suppose to go for an mri but in the interim i'm trying Rowatinex. What do you have to advise? Do you think its a kidney stone? Earlier this week i experienced a burning sensation while urinating after startin the rowatinex it stopped. Its been 5dys i'v been using rowatinex.