Maybe @STILL N OF PIKE can come down and show you some core strengthening exercises.
You are probably dealing with some type of imbalance or restriction in your connective tissue/fascia that never got resolved after you hurt yourself.
I’ve been busy and have not looked at models today. How wet is it looking for the Northern Berkshires tonight?
Supposed to be camping with friends but I might hold off until tomorrow if it looks real wet.