I woke up with a stabbing pain in my right shoulder, after 2 weeks still have pain?

I woke up with a stabbing pain in my right shoulder blade in my back, next day had same pain but pain also started in up part of the back of arm and that evening, I could not grip with my thump and index finger, dropped coffee cup, and lower arm up from pinky finger is numb. Two weeks later still have bad pain under shoulder blade in back and in back of upper arm. I am a Diabetic, A1c is 7.3 and I take high blood pressure meds and have a sluggish thyroid I take meds for.

Age: 59
Female
Medications: Blood pressure meds, victoza insulin, humalig insulin at meals if blood sugar is over 150, sertraline, acrid,
General Information: No

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