I have a stabbing pain in my lower back. it hurts so bad at times that i almost fall over and i get overwhelmingly hot to the point i feel like vomiti?

Low back pain: Is pain over the spine or to one side? Does it shoot down leg? Any numbness or tingling in leg(s)? Previous history of back injury? If NSAID & heat don't help, have fp or orthopedics examine you. Other possibility: kidney stone. Any blood in urine or difficulty urinating? See doc for good evaluation; if pain very severe, go to er for workup.