You're doing the right thing seeing your doctors for any problems lasting longer than two weeks, but I often waited even less than that. Hopefully, it's something minor, that can be helped with physical therapy or specific stretching exercises. You mention stiffness where the scar is, so I assume you may have had surgery? If so, you may want to add a visit with your ENT too.
I'll be starting PT soon myself for a few ailments.
Good luck