New bruising 6 weeks after lumpectomy

Hi, over the last week I have noticed purplish bruising under the breast which was operated on. There is now bruising under my arm too. I’ve been doing the rehab exercises focused on improving shoulder mobility and yesterday i had a CT scan in preparation for radiotherapy. I’m also massaging the scar. There is not pain or heat from the bruises. Can anyone put my mind at rest because it’s the long Easter weekend and I can’t contact the breast cancer clinic until Tuesday? Thanks x