Hey Sunroof, I feel you on that sciatica pain. It's tough to live with.
Have you tried this stretch to address it?
Worked wonders for me, still use it when I feel tension build in the lower back.
https://m.youtube.com/watch?v=bLdUHiJhvGM.
After many months of dealing with sciatica pain I had a shot to relieve the swelling. It eased the pain right away. Then the stretch eliminated it and kept it away.
A few days of the infused oil might also aid the muscle relaxation to turn it around.
All the best in getting thru it.
Cheers Richard