I do have lymphoedema and can't emphasise enough the benefits of having a properly training lymphoedema therapist. While my lymphoedema is in my arm, I also had a persistent seroma over my breast scar, which occasionally turned my skin livid red, know that feeling. I started massage on the breast area just a little too late to save myself from a nasty infection. Feeling exhausted and overwhelmed is a very understandable reaction to all this. Have you a breast care nurse or someone who can recommend a counsellor experienced with cancer patients? I saw a terrific counsellor for a few months after three long term side effects struck. Best thing I could have done as if helped get my focus and my breath back. Deep breathing helps but most of all accept that what you are experiencing is as normal as anything can be at this stage, especially when half the world expects you to be just the way you were before this whole schemizzle started! Getting help is a sign of sense and maturity!! Good luck.