@DynamoHum you're a smart cookie, so you may all ready be doing this: neck extension, using the muscles at the base of you neck to push your chin back and also looking upwards helps. Additionally, using a door frame to help stretch your shoulder back and your peck/ribs forward is a nice stretch- just try and keep your arm at 90 or lower. Slow and gentle wins the race. You're going to hat me for saying this but the computer work is probably aggravating it.
So right, PolkaDot, computer/desk work for 30+ years has left me a little stoved up, even now. What works best for me is the looking up. Settle comfortably in a chair with back and neck support. Pretend you're stargazing. Listen to some music and relax. And take lots of breaks to look up when you go back to work.
And Spookcat, have some chicken soup. With good broth.
You ladies be good to yourselves, please.