Hi there
It sounds like you have had an immense amount of problems with this and a lot of interventions! Im sorry to hear its not improved. When you had your nerve conduction study where and what nerves was it for and what did it show?
Have you ever had any traumatic injuries in the past? Like a car accident, falling off a horse etc things like that?

How long have you been doing yoga?

Besides the problems you have mentioned have you had any problems with your hip?

Have you had an children?

Sorry quiet a few questions but it does help to know :0)