My 'to-go' for any pain is is to make stronger the area of the body that has pain. It seems to have always worked -- especially midriff/back pains. It's also works like panacea!

I see you say no change in activities but pain is often a signal of weaker, un- or under-exercised limb or area. I'd have consulted a physical therapist, if you must.

Here's one from NYTimes for all-round but the first one is good for all of us:
https://www.nytimes.com/2024/05/28/well/move/low-impact-hiit-exercise.html