Sooooo very sorry to hear the the BC is back
Just know our prayers and thoughts go with you
The radiation will do a number on your skin (I had eight weeks of it once) so it is going to be incredibly important to take extra care, use lotion and do all you can to nourish it.
I would highly recommend a good long talk with your therapist to see know only what can be done in your situation with the skin radiation problem, but also if it might be worthwhile to have some type of MLD during the treatment.
It gets really critical too when you mention the CHF.
I don't have that, but do have extensive lung fluid from the lymphoma. Its so bad that I don't even dare wear arm garments, sleeves or the like.
Tried it once and within a few minutes, I was literally unable to breathe.
Here's to the best for you
Super hug your way too