quote
[My neck is giving me a hard time. And I have major complaints of the back pain that feels like it is radiating into my stomach and chest! Phew- I would think I was having a heart attack from the chest pain, but it is just the major spasms from my back. That pain stops me from moving at all and makes me scream and cry! I hate it!! My Dr. is hoping that the muscle relaxers will help, and she told me to take ibuprophen for the muscle pain I am having on top of the nerve pain. I am trying that.
]

I might have asked or mentioned this before {brain fog} do you have TOS, Fybro or CMP also?
your description above sounds so much like what many with TOS have had and been thru.
CMP & Fybro I believe can get spasms too.
But I think Fybro and CMP have more all over symptoms.
It's been a couple years since I compared all of them.
Usually it goes like this certain activities = soreness, tightness, triggerpoints and then spasms
and usually there is a delayed pain effect- hrs or even a day or so after the use/activity

Does RSD cause spasms too?