The biggest lesson Dad & I learned from surgery (like yours) and IMRT is PATIENCE. It's a hard lesson. Your symptoms are much like his were. He is better every day. He started PT 2 weeks after surgery for neck & shoulder (although ENT didn't think it "necessary", he did right the required order) at my insistence after reading posts here and he is soooo glad he did. He kept it up all through radiation, too, even as sore and tired as he was (and twice your age & suffering another type of cancer, too). Hang in there, kiddo. You can do this!