Notalgia Paresthetica help

Hi - has anyone been diagnosed with Notalgia Paresthetica? I've had the itch that comes with this condition for years, but it has worsened over the last year and is now very painful. The center of the pain is under my left shoulder blade. I'm also experiencing numbness in my left arm. I've had x-rays and MRIs but no doctor has been able to address it - or even acknowledge that it's an issue. I've been in physical therapy for months and tried acupuncture but neither have helped, although my posture has improved greatly. Any feedback is appreciated!