@beachy managing much better now, I swapped ice out for heat and also realised I was trying to hold on to the cushion of the sling by clamping my arm on it thinking it might fall

this was engaging my very sore shoulder muscles, have got physio on Monday so hope still ok after that but also seeing my GP so will get more meds just in case
Glad you have a date for your knee , though I am sorry you are having to do it , I am sure you will be fine unfortunately we are both becoming old hands at these surgery's