Hope your feeling better sooner than later. For my back issues I purchased one of those over priced Brookstone massage chairs. Feels great but the most effective tools at home I use are
a) My inversion table. Hanging upside down at various angles. Decompresses the spine. Love that feeling.
b) Precor stretcher. Chair-like device which tilts back to fully stretch back/groin/shoulder muscles. Purchased both at a fitness equip. store on Anderson Lane (North side) between Mopac and Burnett.
c) Back Knobber from "Relax the Back" on Brodie. An S shaped hand held device which releases trigger points and works out the knots manually.
d) Rolling on two Lacrosse balls in a sock (More effective than tennis balls) for spine alignment and tension trigger point release. Painful at first but extremely effective.
e) Rolling on foam roller for Myofascial release and alignment also from RTB.
f) Lower back stretcher which you lay on also from RTB.
g) Hatha Yoga for the back which performs miracles.
h) Also a single lacrosse or tennis ball on the floor under the butt cheek applying steady pressure directly to the trigger points (Parts that hurt for 20 seconds until they release) will do magic for lower back tension and pain.
As you can see I have serious back issue experience but staying fit through daily exercise and regularly using the above options combined keeps me rolling. I hope any these help. They all do wonders for me. BTW also drink TONS of water and I'm sure the doc already told you about using heating pads, ice bags and ibuprofen to reduce inflammation before doing anything else. Good luck