Bad back pains any advice?

I have had a chronic back problem now for about 3 years. I have been to so many doctor, surgens, back specialist, physiotherypy, chiropractors............The pain has caused me to quit 2 jobs already. It gets to the point where the pain is to much and then I must quit because I can't get a clear dignoises the the companys don't believe me. Both times it has healed 90% after 9months and then 9 months later becomes unbearable. I always have good days and bad days and the pain never completely goes away, doesn't really matter what I do, sit, lay, stand. Bending is the worst for it and walking, exercises don't help. Have tried back braces but no good either. Pain killers have no affect, feels like a tooth ach in my lower back and sometimes shoots into my legs and sometime tingles and goes numb. I feel it starting to go again and not sure what to do! Please help if you can.