I’ve never had collarbone pain but everywhere else.

I have bone pain, although I don't remember in my collarbone. Arms, yes, legs, yes, feet, yes, hips yes. These pains may be diagnosed much of the time with assumptions of age related conditions; however, there is considerable anecdotal information from patients that these pains also result from their MPN conditions. Most MPN patients have chronic inflamation that may in turn be responsible for all kinds of things from itching, pain, heart and kidney issues, etc. If this pain becomes worse and/or doesn't go away, please complain to your physicians and don't let them get away with their propensity to say "We/I think" or assume that your age is the culprit without further investigation.

Yes thank you, I was thinking the same thing. Will make appointment to see GP as I agree we have to keep banging on their doors.