Is this a work comp case/claim?
Is the vocational doc a work comp assigned dr??
* If so I'm not surprised by the not related to injury talk..

Do you have your own dr too, if pain/injury seems like it might be serious , seek out a good WC atty... to help you navigate the system..
We have a Work Comp forum also.. not very active, but searchable past post/info/tips & the sticky threads.. https://www.neurotalk.org/forum30/

On the injury itself.. was it a back related injury? Strained or hit by something?
If the injury was not at all related to the back, then the T7 issue might not be related..

I would see your primary , just to have another opinion and that it is documented in the office visit notes..
paper trail & documentation is very important for any claim, you can even make a time line of accident & symptoms. it is so easy to forget some things..