Hi @jenott
I had some physiotherapy after my mastectomy and radiotherapy 4 years ago.
I had treatment by a physiotherapist who specialised in breast cancer patients and with a combination of massage, laser and exercises I got it sorted.
I got the recommendation from my McGrath breast care nurse at the time.
I see you are in Penrith and the physio I used was in Bondi Junction so probably not convenient .
Also I saw her as a private patient.
Anyway , I mention this as it worked for me.
Also agree with other comments worth getting new and unusual aches and pains checked out as could be possibly a recurrence.