Any chance this could be something besides bursitus? Torn rotator cuff, ligament damage? Is your Doctor an Orthopedic specialist? I am saying this because one of the tests for rotator cuff is arm out straight sideways, you trying to hold it up as Dr gently pushes down on your hand. If you can’t resist push, it is probably torn/worn to the point of needing repair.
Now as for " I can’t take time for that!!" The torn muscles start retracting shortly after injury, so waiting any time makes repair and 100% recovery more difficult, to impossible. My Mom had a sore shoulder off and on for years, would not go to the Dr. Finally it started hurting a lot as she had to use a (wrong sized) walker. Exam showed sh had torn shoulder at some point years before, now wrong size walker use had hurt her again. But there was nothing they can do to fix it now. Muscles had atrophied away. So now she just has to manage with the shoulder. She still being stubborn in refusing to use the lift part of lift chair, instead of pulling herself forward to rise from chair. Keeps the bad shoulder constantly in pain.
So if you have not seen an Orthopedic Dr,this might be time to schedule an appt. Get a diagnosis to be sure you are treating the soreness in the correct way, not just guessing at your problem.
Husband has had to be repaired several times from wear-and-rear injuries as Farrier with a long working history. Body parts change with use, time, so you need to get them fixed. This is even if the timing is bad, so injuries don’t get worse by waiting. A friend waited on his surgery, kept putting it off, “hay is ready, busy season at work”, went on until he wore thru his tendon because clavicle bone had reshaped to a sharp edge to cut it. Only regained about 75% of strength, bicep fell and did not return to previous firm condition. Plus Doc had to work very hard to pull tendon back up and over shoulder to “tie the ends back together”. Very sore, along with surgery repair pain. He was off a very long time, unable to do much on the farm or his job as a piano tuner. BIL was a similar problem, but by putting it off he ended up needing a reverse-shoulder replacement surgery with a long recovery. Also loss of strength he won’t get back.
We have the Ortho Dr on speed dial!! Getting in to be checked, diagnosed, treated if needed, shortens healing time, doesn’t let us injure things worse by ignoring the pain. You might have to “shop around” to find a good Orthopedic Dr, but certainly worth doing. Ours is also a horse woman, understands what we need to do in daily life with horses and farm life. We MUST be able to function, she helps us do that.
Best of luck getting better.