Yep, keeping working really makes for ongoing problems, do you have options of taking time away for some walking & maybe gentle stretching?

Often some opposite postures will help to re set the muscles a bit.
I may have missed it, what kind of work do you do?
lots of desk /computer work and such?

I did assembly work and would take a few minutes during breaks to stretch in the ladies room they also had a bench so I could lay on it and let my neck & shoulders drop back and relax.
Mainly used Sharon Butler's RSI gentle stretches.