Suggest Treatment To Straighten Spine

I am 49 years old, I ride horses... my spine is out of place and very painful in my mid/lower back - I have tingling and numbness down my left leg.. if I sit or lay down too long I can barely stand without extreme pain, but I cannot stand for long. I am doing stretching exercises and taking Motrin for pain. DR. is not an option here, what else can I do to straighten my spine and get back to work?