I'm hesitant to give any advice since I'm so new here. But I do want to mention that I've had sciatica for years, and I've tried many things, months with a Chiro, exercies, one on one training with a professional, etc..but the things that helped the most have been first the raw food diet where I'm around 75% for raw, then raw organic apple cider vinegar, and then the parasite cleanse.
You might try the raw unfiltered type of acv, works like a miracle.