100%! In fact, I started losing mobility because of pain in my left leg at the end of 2020 and into 2021. I had surgery last May with a surgeon who had experience with sciatic and sacral nerve endo. He found endo "dangerously close" (his words) to my sacral nerve and excised it. I've had sciatic pain for at least 15 years and not one doctor had thought to connect it to endo...it was my own research that led me to ask that surgeon about it. Now my sciatic pain, back pain, and leg pain are back and I have a consult booked at the end of next month to see if he would recommend another surgery.
There is also documentation of endo on the spine. https://pubmed.ncbi.nlm.nih.gov/24531988/
I'm guessing you've already talked with your doctor and they recommended the Pregabalin? Is it helping?
~Katrina, Endometriosis.net Advocate