I did something to my rotator cuff... in my sleep. No joke.
At first I though it was a heart attack since my arm hurt so much and the pain traveled to my neck, but after four days it would be the slowest heart attack in history so after popping aspirin like pez for 96 hours I used my medical degree from GUMS (Google University Medical School ) to narrow it down to tendonitis, bursitis, or a rotator cuff injury and then selected the last one.
Whatever it is... YOWCH.
I feel your pain! I messed up my (only) right jaw joint in my sleep somehow. Literally could not open my mouth more than an inch one morning. It made brushing my teeth almost impossible, let alone eating. It has taken muscle relaxants, ibuprofen, and about three months of chiropractic care to be fairly pain free.