Thanks for the reply, Phoenix.
I started a new position at work a couple of weeks ago, but nothing changed physically. Still have the same office chair, etc. I am mostly a side sleeper. I already do the ‘pillow on chest’ thing, as well as one to support my back.
Can you elaborate on this point:
Are you saying that I perhaps should go for a memory foam topper instead of a soft talalay one? I understand you can’t say for certain about these things, but I’m just trying to clarify what you meant here 
Also, is this still a good list of vendors for latex toppers? I found it by doing a search here:
https://forum.mattressunderground.com/t/foam-factory-any-good
My plan was to look around their sites/email them with my situation, and see what they recommend.