If the cause for the numbness isn't from the c spine ( that should have showed on the imaging) then most likely it could be caused by trigger points and/or sticky tissues.

Nerve glides might be something to try - gently of course
there a description & link in our useful sticky thread maybe around post #24??

self trigger point work w/ a tennis ball or any small ball - against a wall or on the floor to locate the hyper irritable spots & provide the pressure to release it.

Is the numbness of the arm and foot both sides, or only 1 side and if so on the same side?

If you have EDS - I don't know if strengthening is the best thing for you and if TOS also another reason to avoid any therapist that wants to strengthen right away.

Pain & symptoms really need to be resolved first before starting any strengthening program.

So many in the past have had PT automatically start them on the hand bikes & resistance bands or weights and made them so much worse...

What works for normal injured people does not work for us w/TOS and if you add in EDS or fibromyalgia or such, they need to slow down and resolve as much of the pain and symptoms as they can first.

PTs need to personalize our sessions and re adjust as needed and how we feel each time we come back for the next session.

Delayed pain - this is another big thing for us - we might do ok during the session but soon after or maybe even a day later we will flare up with increased pain/sx..

So it's really good to make notes for yourself or a little journal of pain/sx - and list what is good and what makes things worse.