My body had started rebelling at the (boredom?) of only one major sleep position -- sitting upright in bed propped up by pillows (one bolster, 7 bed pillows and a horseshoe-shaped neck pillow) or propped up on my right side, but still for all practical purposes "seated". And my tush didn't like having all my weight on it not only for the 8-9 hours of sleep, but then for all the normal daytime sitting (such as here at the computer).
So started experimenting on Wednesday or so. Tried lying horizontally on my stomach with my arm hanging down on the side of the bed. Okay, I guess, but I was afraid if I woke in the middle of the night (to change positions perhaps?), I'd forget my arm was broken and do something painful or damaging. Then I tried lying horizontally on my right side with my arm resting on top, on the left side of my body. Uh uh. Gravity pulls the arm back towards my head and it's painful. No go.
Then yesterday I tried the third option. My bolster has flat surfaces, one of them is angled. I turned it onto the larger flat surface, which gave me sort of a ramp to elevate the top part of my body. Stuck a pillow to continue the ramp and support my body. Stuck a pillow for my head on top. Lay down on my right side and supported my arm with a pillow on my left (top) side. IT WORKED!!! It's sort of halfway between sitting upright and sleeping in a normal horizontal position.
Slept that way last night. Wasn't perfect. Woke after a couple hours with my arm aching and needing to be in another position. Rolled onto my back needing to support my arm on another pillow, but it worked out fine. Was back in the original position again before morning and then back to the back position. BUT IT WORKED!
So -- down to the bolster and 3 (maybe 4) bedpillows. WOW! I feel like I'm getting closer to "normal" (whatever THAT is).