We have another member here who I think might be of help.....
I've been reading the testimony of Patti_Christmas and see that she has described something similar......
I hope she sees your thread and will have something to share that may be of help......
I'll post a link to one of her recent posts describing her ordeal......and you can contact her via visitor message on her profile page or post on her thread here at this SCS forum......
Here is one of her most recent posts (if you haven't already seen it)......and as I read thru it, I see she describes a similar chest/abdomen/ribcage issue....

http://neurotalk.psychcentral.com/post748971-2.html

This is very intriguing....and alarming!
I'm hoping you get answers very very soon!

Rae