Is it possible that a pinched nerve can cause pain in the pubic bone area? like a small sharp pain comes & goes. also n thighs/pelvic & lumbar region

Yes: Nerve issues from the spine or the hip area cam radiate to the groin.

Yes,it could: A pinch nerve can give you a hole variety of pain patterns however the usual pain patter from a pinch neve in the low back is radiation to the lower extremities with a tingly, sharp pain associated some times with numbness.Pain in the pubis itself usually have a local pathology.