I have ankylosing spondylitis and was taking enbril but due to insurance issues can no longer afford it what are some exercises I can do to keep on top of my lower back inflammation?

I have a herniated disc between my L5 and S1 vertebrae, and sciatica…my Dr. wants to give me a series of epidural injections for pain relief. Anyone know if this works, or have any experience with it?
I’m looking for alternatives to surgery…it looks like epidurals, or a lifetime supply of Lortabs…none of it is fun in my book…
I never had back pian, except for during "that time of the month", I’m not a small girl, I’m 5’11 and weigh almost 200 pounds, my BF and I went swimming, and decided it would be fun to do some cannonball dives into the pool…sounds fun right, The pool was only 5 feet deep, and I had a running start, jumped, and smacked my butt on the bottom of the pool hard!!!
I was in extreme pain at the time of impact, then it faded, but came back with a vengance the very next day…I went to urgent care, the did an x-ray, found nothing, and tried to tell me it was just a muscle spasm…the pain grew & continues to grow more severe on a daily basis, I kept going to Drs, the kept telling me there was nothing really wrong with me & sent to me tio physical therapy…that did not work…One day, at work, I nearly collapsed because the pain got so bad…I went to the ER, and they gave me a pelvic exam! (DUH). Nothing wrong there!!! It took a year for me to save up for an MRI, and voila! There it was!
I manage a women’s clothing store, and my work is very physically demanding, wich has only made the injury worse!!! I am in constant pain & I’m getting soooo sick of having to take pain meds, when half the time, they don’t help anyway….

will you please have a look at this http://www.quelle.ro/ro/q4r/home/suche/FH_bmZoX3BhZ2V0eXBlPWRldGFpbCZuZmhfYWN0aW9uPXNlYXJjaCZmaF92aWV3X3NpemU9MTAmJmZoX3NlY29uZGlkPXJvXzcxMjEyJmZoX2xpc3Rlcl9wb3M9MCZmaF9sb2NhdGlvbj0lMmYlMmZxdWVsbGVfcm8lMmZyb19STyUyZiUyNHMlM2RpbmRyZXB0YXRvciU1Y3UwMDIwc3BhdGUmZmhfZWRzPSVjMyU5ZiZmaF9yZWZ2aWV3PXNlYXJjaA==//m-71212/index.html ?

did you used such thing ?
Is it possible to use it while making an effort, such as phisical exercise? Can someone be ok to wear it all day long ?

what type/brand to go for and some details on how it can help with pain relief should be included..