Have you tried spinal decompression exercises? I do them everyday after my back got f@#$*@ up after an IED strike. They work wonders for me and it doesn't hurt to walk anymore. Any doctor, including your M.D. with a family practice, can show you how to do them and may be able to help you before it becomes a chronic problem.
I have to ask this: have you thought about getting into a pool? Take it from me ( as a former HS and college swimmer) that swimming REALLY IS the best workout you can get. Cross training in the water will help your weight lifting regimen like you couldn't imagine. Just a thought...
2008 ///M Coupe