Tony, you are SO NOT (yes I'm yelling - but out of respect) a coward or a loser..you have anxiety disorder, and you are doing the very best you can, now stop beating yourself up or I will get grumpy (trust me that's not so nice!!!)..
I can't even tie my shoes (thank god for velcro) when I'm that anxious let alone walk into a medical centre, let alone into an MRI. I think you are the bees knees and you should too okay? It may take some time, but you will get through this. It took me three weeks of severe concussion and pain to get my first MRI and I sooked like a baby, even tho I was full of xanax. I really did.
Now, lecture over, I hope that injection helps Barb, and know that I am thinking of both of you.
Many, many hugs for both of you (and some cheese fries to share)