georgie, i have a slipped disc thats pressing on the sciatic nerve so i get where your coming from.
and this is in addition to the conditions i get wpms for , so just an added bonus.
my specialist got the ok to give me a spinal injection and for 6 months i had no pain from it, its wearing off a bit now but i dont get the shooting pains anymore just general lumbar pain around the disc site.
its not perfect but it is a big difference.but i have had to change the car for something easier to get in/out of.