If the tarlov cysts are at S2, 3, or 4 they could be pressing on the nerve roots that lead to the pudendal nerve and therefore can cause some of the same symptoms as pudendal neuralgia. But if you experienced a sacral injury it's also possible your SI joint and ligaments were affected and that your pelvis is out of alignment causing pressure to be put on the peripheral pudendal nerve.
PNE since 2002. Started from weightlifting. PNE surgery from Dr. Bautrant, Oct 2004. Pain now is usually a 0 and I can sit for hours on certain chairs. No longer take medication for PNE. Can work full time and do "The Firm" exercise program. 99% cured from PGAD. PNE surgery was right for me but it might not be for you. Do your research.