I had sciatica from a herniated disc when I was younger, I know what pain you are in. You have my sympathies.

I get recurrent neuro pathic pain, very similar to sciatica but different nerves, in my legs now due to hip arthritis. My orthopod prescribed Pregabalin, which has successfully managed that pain until I can get a new hip, hopefully soon.

You might want to consult your MD or a specialist.

Best of luck!