Hello & Welcome,
I think you might know a lot more after the mri results come.
- you can usually request a copy of the report be sent to you if you'd like to see what it says before seeing the dr again. It could help you think of specific questions you might want to ask at the next appt.

since you mention carpal tunnel...and that you had it before - I'll just mention that there are other repetitive strain injuries that could cause some of the symptoms you mention.
Does your neck, shoulders or upper back feel tight and achy?
One is thoracic outlet syndrome {TOS} we have a forum for that if you'd like to read a bit about it.
Post # 1 in the useful sticky thread will give you many links with info-
http://neurotalk.psychcentral.com/thread84.html