I also have shoulder pain and a diagnosed labral tear, due to a fall while practicing Aikido.
I can tell you this:
1) shoulder pain can last for many months/years
2) avoid cortisone, it can weaken the tendons, and apparently in the long term does not help!
3) MRI is not very sensitive when it comes to labral tears. Did you have an arthogram instead? this test includes the use of contrast liquid, to better see a possible labral avulsion. Notice though that even this is not too sensitive (especially for Perthes lesions).All this does not mean you don't have a tear: in fact you could have one, and something else too. Or your tear might be bigger...or just not be there at all: only arthroscopy could shed some light.
4) Doctors often do not know what is causing the pain...a tear can have no symptoms (when we age the carthilages tend to fray and become weaker)
I would continue with PT, and also take maybe glucosamine, unless pain is stopping you from doing the things you love, or your range of motion/strength are severely affected.....
I am sorry about your job, it must be tough...
What kind of tear did they find and how big?(if they told you that is)...frayed labrum is somehow less problematic that avulsion (detachment), but that does not mean they cannot heal...
The other tip is to use heat (or cold if you just strained it)...acopuncture I never tried myself