I'm coming off a very similar injury. In June I got stacked up while rolling and got a shooting pain down my neck and arm, that went away fairly quickly. I didn't think much of it and let it rest for a couple of days. Over the next few weeks I was getting numbness in my left hand. I finally went to the chiro and got adjusted two days before a tournament, which wasn't smart. The relief was immediate, numbness went away. Later that night everything in my neck and shoulder seized up and I was getting deep constant shoulder pain from the brachial plexus being pinched. The next week was pretty horrible. I continued to use chiro treatments for the next week along with ice and message. I'm lucky because my fiancee is a message therapist and in PT school. It took about 6 or 7 weeks before the shoulder pain went away and that was with a consistent diet of mobility, ice and message. It was another 4 weeks before I could get back on the mats or in the gym. I'm finally back to feeling 100% and training again for tournaments in December and January. If you want to know any specifics on the rehab, just let me know.