Stretches for back pain

I know I haven't written much in a while but I promise this will not be an entry on procrastination.  I have been having back pain and I have done some stretches which have not only aggravated my back, but it has helped my back at the same time.  I do wonder however, if my exercise schedule is a good thing.  I have been diagnosed with a degenerative disc problem and so far, exercise has done me some good.  I am not sure if I have lost weight or anything, but at least it has been beneficial.