Hello Jan
I also still have quite a lot of discomfort on the surgery side including my armpit. I mentioned it to my onc and was told it is pretty normal.
I also still get random swelling on the surgery side. I can't say I have noticed anything more than usual period related aches on the non surgery side.
I am sure your onc will reassure you when you see him and don't forget it won't be long until the first of your yearly mammograms.
Xx