If the tingly's are down the arms, it's not carpal tunnel (Or at least not ONLY carpal tunnel

Carpal tunnel effects the thumb and possibly the 1st finger of the hand. It's painful, not so much tingly.
MRIs are GREAT tests. They can help rule out soft tissue injury of just about any kind. This includes injuries to discs, nerves, tendons, muscles, etc. The symptoms you've given indicate something that is compressing the nerves as they exit your cervical spine or possibly in the shoulder region.
Odds are either something like a disc injury or a pinched nerve is the cause (very common for those symptoms). I'd be interested in hearing the results.