You have my sympathy... I have had sciatica as a result of L5 S1 disc protusion since May. I managed to work the first 3 weeks.. then was completely immobile for about 3 or 4 weeks, with horrible pain for which I had all sorts of combinations of meds.
Getting the pain relief right meant i could start moving very small amounts around the house, so worth discussing other options with gp. I have ulcerative colitis so tried ibuprofen gels, deep hear and freeze sprays as well as lots of oral meds. Gabapentin and notryptiline with paracetamol were tge best i could be on for any time... now coming off those.
Chiropractor and acupuncture helped gradually improve...and when things got better I've also had some reflexology.
The best thing I found for relief was heat... a microwave lavender bag or hot water bottle., I got one of those jelly honeycomb cushions from amazon which was amazing for the bum pain.
Improvement really started on holiday...,in the sun and walking/stretching in a warm pool and has been gradual since. I have lost a lot of use in my leg, still using a walking stick... or crutches for a longer walk but managing 5 to 6k steps a day, physio exercises and plates.
I have been offered the nerve block injections but am holding off for now. It does get better, but it is slow and some days are better or worse than others., but don't suffer, speak to gp or pharmacy as there are lots of options for pain management .
Hope you feel better soon