Back Out Again Part II

So, I've been having back pain which I attribute to a muscle spasm. I've had this condition before almost a year ago. My physician sent me to physical therapy where they applied electric probes(EMS or TENS) to my back to stimulate the muscle and gave me exercises to do. It helped. This time the excercises aren't working and even a intense massage from a good masseuse didn't help. I've popped two Aleves and four Ibuprofens this am/pm and still the pain lingers. It's mainly when I'm in a seated position which is all day. Getting up is very painful. I'm scheduled to go to my Dr to either get a Rx for therapy or something. I've been on WebMd and they say BOTOX might help the muscle spasm release. I've also research EMS(electronic muscle stimulators) and TENS for my back but can't seem to buy one. I've got to stay off Webmd.com b/c I can find a million things wrong with me.