Graciebowen, I am so sorry for all the trouble you are having. I would assume you have told your surgeon? If you have, and he is blowing you off, I think you should get another opinion.
You most definitely need to find out why you are wetting yourself. Do you have no control ever, or does this come and go? Can you stop the flow? Who told you there is a mass behind your hardware and what did your surgeon say about it? Again, you have to handle this one of 2 ways.....either demand he look into it, or find another spine specialist. It could be that the mass is putting pressure on your bladder, which I'm sure you have thought of yourself
or it could mean there are new problems rearing their ugly heaRAB.
I have been going through some bad pain myself, with 6 lurabaar surgeries behind me. Been going to a PM for the last 5 years and he has done many procedures on me which have helped. But not anymore. His suggestion was an Spinal Cord Stimulator. But I went to my surgeon, had a myelogram and ct scan and found a bunch of problems for which surgery is scheduled on October 27th. Sometimes you just have to follow your gut feelings and push hard.
If this surgeon (neuro or ortho spine specialist) has done all the surgery on you and you have a good relationship, you might try pushing him. On the other hand, if you aren't really happy with him, then it is time to seek out a new doctor. I recommend the Orthopedic Spine Specialist as they, in my experience (and there are certainly excellent NSurgeons out there) are much more apt to listen and really dig into what is going on. I am surprised that no further testing such as myelogram with ct scan has been suggested to try to define that mass.
I don't know if any of this helped you, but I wanted you to know that someone is listening to you. Please continue to post and let me know how you are doing.
Carol