hi Insmith1084 welcome to the support group -
I have nerve damage in both legs from the nerve roots of S1 and had Fusion surgery in 2008 L5-S1.
Most times, CT Scans or MRI's will not show sciatic problems unless it is associated with a disc that is bulging pressing on the nerve roots - and sometimes the film results may not show this.
it's a good idea that a spine specialist, either a Orthopedic Spine Specialist or Neurosurgeon Spine Specialist review the film results of the CT Scan and MRI as they are the only ones that can read film results dealing with spine issues.
Pain meds don't touch the nerve root pains but there are 2 meds that do help with nerve root pains - Neurontin and Lyrica - Neurontin has a generic - Gabapentin and is cheaper to purchase.
I take Gabapentin for my nerve root pains and it does help a lot. I notice a big difference especially if I forget to take a does as the pains come on with a vengeance!!
Once you have seen a spine specialist they can let you know the best treatment options - seeing a good pain management clinic may be suggested. I see a PHYSIATRIST Pain Doc and they are great.
http://www.spineuniverse.com/treatments/what-physiatrist I hope that you can or are seeing a spine specialist and that you can get the relief you need. let us know -