Tenonitis of the Rotar Cuff

Almost 2 years ago I started having problems with my left sholder, a year later my right one started.
I say shoulders, but I can also feel it in my arms. I can only life either arm so high, and it hurts like blazes.
I was told that it was probably from repetion in my work.
I have been at the same job for almost 30 years. At the moment I work on a computer and in the Photo Lab.
In the Lab I have to reach over my shoulders to fill the big Paper Rolls which yould weigh about 10 Lbs.
I also mic Chemical by stirring and this seems to make things worse as well. For years I worked as a Cashir ringing in and baggin Groceries of all shapes and sizes.
I went to Theraphy for 15 sessions.
I had the cold and hot heat, the tens machine, Ultra Sound, Laser beams and 2 sessions of AcuPincturre. Not making a lot of progress it was suggested that I should not work for a while and see if thigns would improve. I continued to work and still do, but lately I have noticed tingling in my hands and fingers.
My Dr. says that would not be from the shoulders, it would be from my neck?
I had an xray on ,y shoulder 1 years ago. Nothing showed, I went to a Orthapediac Surgeon and he said to take Viox and Exercise. He did not do an arthiogram or anything.
I am at my wits end, seems like no one wants to do anything.
The reason I did not take time off work is because the Dr. didn’t think it was necessary.
He told me to watch my limitations.
I have a hard time somedays even doing my hair etc.
Help!! Any suggestions