Do you have access to anyone who does graston or has a set of hawk grips?
Either one will do wonders for breaking up the scar tissue.

What is your sitting position like?
Are you getting up at all when you are sitting at length?
Any thought of going to a standing desk?
Sounds like looking at your sitting position will help.
You may have some low back stuff going on as well.
What are you doing to address the inflammation in the area?