What kind of doctor should i see for a sore lower back?

Your own: If you have a primary care doctor, you can start there. In some states, you can go several times initially to a physical therapist to aee if some guided exercise and treatment helps. Some see a chiropractor. If these evaluations & treatments do not help, you can see a physiatrist, orthopedist, neurologist or a neurosurgeon for a further evaluation and treatment recommendation.