I wish I could give you some encouraging info but, like the doctors, I have no idea what could help. All I know is that I have gone thru similar, where a dr or nurse has touched me, put pressure on an area and caused pain lasting weeks or more. Maybe they irritate nerves already irritated and, evidently, make things worse.
I know that was of no help whatsoever but maybe knowing you're not alone helps take some of the sting out of it.
I wish you well and hope you find an answer. If you do, please share :)
edit* Pressure was placed on GB20