Hi, It seems you have read quite a few things for your pain. Now let us understand pain going to arm. Your arm has 3 major nerves 1) Radial 2) Median 3) Ulnar You are right that your median nerve might have stretched. But along with nerve there are other structures in hand. Also I need to know what is distribution of pain in arm...whether it is in front or back of arm. Also what is your occupation? It is quite common these days to have cervical nerve compressions in your age.

You can definitely add a neutral splint. Extent of injury can be found emg ncv by measuring slowing of nerve conduction and amplitude. Add nerve vitamins for fast recovery with rest to the area affected.