Hello cherie1955,
I haven't heard anyone mention a pain that feels like it is radiating from back to front like you describe - I hope that those that had surgery can give some insight about it for you.
Unless you are having many upper body muscles in spasms and it just seems like it is radiating...
I've had the spasms that caused the breathing weirdness and even thought my heart was beating oddly - but it didn't radiate to my back..
I do know that the rhomboid muscles under the scapula {shoulder blade } can get very fatigued and develop trigger points - but that is usually more of a burning sore spot felt right in that area only.
Be very careful during your recovery time- falls , slips, quick reaches can mess up things.
I'm sure others might have ideas for you..
There is the long thoracic nerve- that runs near the scapula?
Do you have any scapula winging ?