hi and welcome to the support group -
I am sorry your post has gone un-answered - I just now saw it - so again sorry it has taken this long to respond -
first - it sounds as though you are not getting the right treatments from your doc - so I would suggest that you get a couple of opinions - from both Orthopedic Spine Specialist and Neurosurgeon Spine Specialist -
I had my fusion in 2008 - my surgery went well and I fused 100% but they could not do anything for the chronic low back pain or the nerve damage in both legs (left leg is worse than right). I too had the 'trial' spinal cord stimulator, however it did not work for me - it did wonders for the leg pains but it increased my lower back pains almost tri-fold - we tried all different strength levels but nothing worked so the 'trial' leads were removed. you can click on my name or pic and read my story -
I have been thru all treatments and nothing has worked - the best thing I have found was a good pain management clinic - they are PHYSIATRIST and they go deeper into pain management - more so than the regular pain clinics - here is link describing what they are and what they do:
http://www.spineuniverse.com/treatments/what-physiatrist when you get the other opinions from the spine specialist they can refer you to a PHYSIATRIST Pain Management clinic - they will review your history and determine what course of action is needed. they are not ones to continually do treatments that do not work.
I would suggest that you go this route - getting more than one opinion will let you know what is wrong and what action should be taken.
please keep us posted - take care - Joy