I've got a herniated S1 L4/L5 treated only through physical therapy -- don't want to do surgery if I don't have to. But it does effect my swing. I stick to a pretty religious practice of walking, stationary bike, various pilates/yoga stretches (planks, superman, etc.) and it keeps things manageable for now. Grab a session with a PT guy/gal and have them teach you the CORRECT way to do them. Then you can just do them on your own.
Back stuff should be diagnosed by a trained professional. But what I know is, when the nerve gets pinched (i.e. sciatica) the muscles around it swell up to protect it. This sets off a whole chain reaction of muscular compensations that have to be relieved (i.e. stretching, etc.) before the root of the problem can be relieved.
My experience anyway... I've found that my body naturally compensates and protects against re-injury during a golf swing (which is good), but results in a different spine angle and downswing action and 20-30 yard draw with a 9 iron (which is bad). But, we shall overcome!