Hazel,
you need to find a nss (neuro spinal surgeon) that believes that a tarlov cyst can cause pain. Many do not believe that it does and in fact there are only two surgeons doing surgery that we know of for certain. There are a few others, but these two surgeons have done more surgeries on the tarlov cyst than any one else.
Those surgeons are Dr. Long at hopkins in baltimore and Dr. Henderson at georgetown university hospital in washington d.C.
your pain could be coming from the bulging disc, but the cyst causes the same kind of pain...Pain down the leg and into the feet making walking difficult...Of course, it depends if your cyst is a communicating cyst...