Hey buddy just hang in there till you see the dr it seems you gonna have to run a few tests on ur neck and shoulder just try to relax and get rest be4 seein your dr
Welcome to the MedHelp forum!
Yes, tumors can press on the nerves and cause pains. Swollen lymph nodes, lipomas, neurofibromas, though all benign can press on nerve and cause pains. Other than that it can also be a pinched nerve. Do discuss this with your doctor and get yourself examine.
Hope this helps. Take care!