Do you have your own lawyer & your own doctors?
They should be advising you on this, as they should know what your sx & pain levels are .. and the delayed pain effect after FCE?

Do you get delayed pain from activities?
Hopefully you have a long time /ongoing relationship with you doctors and their records should show pain levels and any delayed pain instances after certain activities.

For some of us the FCE might be misleading due to the delayed pain, after the test hours or days pain will increase.
Everyone’s version /or level of injury from TOS is so different, it is hard to say for sure.
But you do have multiple issues also... I would avoid it unless you feel you actually could do it.