I suppose the treatment for you depends on what the MRI reveals.
I am paying the price for being active. We either rot away on a couch, eating junk food while watching the tube, or we try to do it right and stay active. In the latter case, wear and tear takes a toll. In the former, you just wither away.
I just went thru a torn rotator cuff repair. Thankfully, it was my left shoulder as I am right handed. Nevertheless, it was quite a shock to be so adversely affected by what I thought was a minor injury. I had severe pain during workouts. I tried rest but no luck there. I went to the doc and he said it was probably rotator cuff and prescribed physical therapy. That just made it worse. I could not even roll down the window on my truck. (It is an old truck and at that time manual windows were still available). I could not raise my arm to reach the light switch on the wall or scratch my head. There was no way I could live like this.
The doc recommended an MRI. The MRI showed a 4mm tear, then a good spot, then another 4mm tear. To me, that did not sound so bad but the damage was in the worst possible spot. It was that top tendon, over the top of the shoulder, used to raise the arm. I don't know the medical name for that tendon. I opted for surgery since tears of this type do not improve by themselves and might only tear more as time goes on.
It has been three months since the surgery. The doc was able to repair it with arthroscopic surgery, re-attaching the tendon to the bone and sewing the tendon back together. He also found cartilage bits, wandering loosely in the joint, and cleaned those out.
I had to wear a special sling for a month, holding the arm immobile at a certain position and I was not allowed to lift the arm with my own power. After getting out of the sling, I could not believe how weak I was. The arm felt dead, I could barely move it, and I had to be very careful what I did or I risked additional injury.
Starting the day after surgery, and every day for the next three weeks, I was told to remove the sling and use this special chair that I strapped my arm into. The motorized linkage raised and lowered my arm for me. Every day I increased the range of motion. I was told if I did not do this, I might not be able to move the arm at all later.
A month after surgery, physical therapy continued. The therapist had to lift my arm for me. I was not allowed to use my own muscle power. Little by little, more stretching allowed more range of motion. At first, I could barely button my shirt.
Improvement is slow but steady. I still have some pain when I move a certain way but I was told that is due to collateral damage from the surgical repair. Scar tissue will form and there will be lingering inflammation for many months.
I have prescribed exercises to do at home and they help. I can now lift my arm straight out, level with the ground, with a whopping one pound weight held in my hand. That may not sound like much but two months ago I could not put on my glasses with the injured arm. Even that slight effort was too much for the recovering shoulder to bear.
I was told that it will be a year before I can get back into my normal exercise routine and even then I will not regain the strength I once had. I heard from some who tried to come back too fast and had to do the surgery all over again. Some have said it is easier to get over knee or hip replacements than a rotator cuff repair. They may be right about that.