Is it Sex or is it Therapy?

I hurt my back a few years ago and my doctor recently recommended a new Yoga Therapist.
I had seen other doctors and Therapist and not gotten any relief.
This Lady Doctor/Therapist checked me over really good and gave me instructions with drawing on how to have sex for relief?
I have not mentioned this to my husband, I'm considering bringing it up to a old friend.
It's been a good while since I have had sex because of the pain, but I'm willing to try!