Have you ever been in a accident or any fall/hit to the head/upper body?
It can even happen during birth or a fall as a infant..no one may know or remember those instances..
hips, shoulders - level across or not?

You might benefit from an Upper Cervical chiropractic evaluation.. aka atlas/axis, C1, C2 etc... info videos can be found on you tube..
It is different from regular chiro, some chiros do a mix or regular & upper cervical..
info-
Up C Spine - A New Approach - Sign / Symptom Checklist
Up C Spine
NUCCA, National Upper Cervical Chiropractic Association

Good PT /DC /other therapies may take years to really see major improvements , especially if any aggravating activities are still being done..