Dixmo,
It really depends on what is going. I have similar issues with sitting, driving, leaning, etc. I also have pains in my legs. Anyway, I know I have a disc bulge at L4/L5 and stenosis at L5/S1. I have had one ESI that didn't work, then facet injections which helped a great deal and finally an RF that worked just great for a year. I need another one!

There are also Selective Nerve Root injections. So, you see, it just depends on what the problem is. The pains I have with sitting and driving are from the facets and the stenosis issues. The legs pains I believe are coming from the disc bulge. In any case, yes, I would get an MRI and take it from there. A good spinal pain management doctor is usually who people see first and then if the situation warrants it, referred to an NS or OSS. At least that is how it has been for me see I go to a Spine Group. Good luck.