From my experience with this same symptom on my R leg from below the knee down, it sounds like nerve damage. Mine happened when I had a catheter relocation placed in my L5 S1. It’s miserable and I’ve been told that it is untreatable by two neuro surgeons. Do get your veins checked out. It’s an easy procedure. I’m a medically retired PA and I would suggest making an appointment with a neurologist when you can. I wish you lots of luck.