Ich!! Sewbizgirl, that test sounds awful! Did he give you a splint to put on your arm to keep it straight at night? I have a splint for my wrist when it gets out of whack that helps to immobilize it.
Dr. Google provided me with these potential at home relief options:
https://www.medicalnewstoday.com/art...#home-remedies The splint is listed here, too. It also says to get lots of sleep because the body heals while you sleep. So you have a great excuse to take some naps!!
And don't watch the news. Everything is way too depressing with those wildfires on top of all the other bad news in the world. Stress doesn't help heal. Janice -- turn off that TV, too!
Quilty hugs to all of you.
PS Try an anti-inflammation diet, too, just in case this is something inflammatory causing the pinch.