I have numbness in my left shin, this started about a month ago with pain in my groin and down the front of the quad, I know my body pretty good but this one has me stumped, ive worked out its back related, if I lie on my stomach and place hands shoulder width apart and push to stretch the pain wil intensify, and I get like tiny electric like jolt s around the upper kidney from time to time, I have gravity boots and was using them to relieve symptoms but have had to return to work and can t use them for another week or so, any idea?