A month ago sneezed & injured back; couldn't bend over, rested. passed. exercised yesterday and now pain back, radiates down lower back to leg.doctor?

See a doctor: It sounds like you probably have a herniated disc. This will usually respond to rest and physical therapy but see a doctor who can evaluate and set you up with physical therapy. Occasionally surgery is required but should be a last resort. See https://www.Treatingpain.Com/conditions/herniated-disc stress reduction also helps- see http://www.Back-in-control.Com/.