I'm Full time. Been there 15 yrs. I am going to go to my local union, but really want to try and get opinions before I do that.
@Lead Belly is absolutely correct, shopping here for answers is definitely not a good idea.
Because what you want to hear, may not be the reality of the solution.
You have rights under HIPAA and our National Master and may qualify you for short term disability while you rehab.
Contact the company's HR Dept, with the aid and guidance of your local officials who should have a working knowledge of the system and past practices in your area.
Good luck and realize that you are already ahead of the curve in acknowledging that you have a problem before you hit rock bottom.
Many before you have lacked the clarity that you seem to possess.
I'll be having a good thought for you.