Garry, collarbone is weird. Also something you can't splint, so until the callus forms around the fracture and stabilizes it there are some moments . . .
Ended up having to work on range and strength in the affected arm, but glad to say that by no later than 5 months after I was able to raise the mast again. (Might have been able to eve a bit earlier, but season hadn't started for the DS). By about 3 months I was crewing on a friend's keelboat for an easy race in light winds. Most difficult thing was stepping onto the boat as it requires holding onto a stay and a support on the dock to make a big step. Using both arms like that in opposite directions wasn't on the menu yet, so we had to improvise.
My advice: avoid potholes (and ladders)