I read on the new members section, that you are a CNA and your arm gave out when moving a patient?

What kind of testing have you had?
Xrays, MRI of c spine at the very least? any other testing?

I would be curious to know if there is a extra cervical rib or other anomaly that might be an issue...

And have you gotten any expert PT /massage/chiropractor care?

Many MDs don't really know the full story on TOS , so finding the best MD,PT, DC etc.in your area will be very important for getting the best care and best recovery.

Sometimes TOS or TOS like conditions CAN be resolved without surgery, but you need to really educate yourself (explore the useful sticky threads & posts here) , for the best chances of recovery. Self care is often very helpful you can tell right away if something is helping or not and make a adjustment. But when pain is high a skilled professional PT or DC is a good way to get started, often they will report to the MD if they find some thing else that needs treatment or attention.

Often making a journal, or just notes and a time line of symptoms is helpful for you and any other treatment provider .
So nothing is overlooked, it is so easy to forget to mention something that might be an important clue.