jeeez. Yes do the physio, it’s almost certainly something you can do something about, and ignoring it is only likely to make things worse.
When I suffered a bit of it, glute and ITB stretches did a lot of good, plus the physio showed me a back stretch I could do on the trail if it went dodgy while I was out. It doesn’t do that anymore. I can also usually save the stretches for after a ride in the privacy of my own home as its got to more of a maintenance thing.
My recurring annoying one is my right shoulder dislocating. I’m in physio trying to cure that now, but it looks like it might have to be a surgery job too. Ain’t nothing quite like going through a small compression and then riding it out one-handed while you wobble the other arm back into place 🙁