Hi Stoic,
You asked me about whether I had any problems with breathing post rads. Like Foxy and Revcat, I don't and although I am nowhere near at the level of fitness now than pre-rads (nothing to do with the radiation treatment) I would not be too concerned about my breathing (at this point in my life). I have had a couple of chest infections since my first breast cancer treatment, but who knows if this is related or not? I also had rads to the right, and understand that this poses a risk to the heart and was also warned about slight damage to the lungs- both are apparently long term side-effects.
You might remember, my reconstruction to this breast failed when I subsequently had bilateral mastecomies in Feb 2012. This was due to to radiation treatment. So, I have had experience of 'conservation' and then having mastecomies, with implants, and then losing one breast when the healing problems meant the implant needed to be removed.
As a result of my experience, I feel that whereas everyone is pretty clear about the risks of chemo., radiotherapy is seen as 'less risky'- most women complain of a bit of redness to the skin and fatigue. I certainly did not realise the significance of the longer term effects on healing. Having said this, I know I wanted to save my breast at the time, so even though I wad not given the choice, I think I probabaly would have opted to save my breast if I could. I know your situation is different and you are different. The other thing i have learned, is that its really very hard to manage 'choice' as like you I have been given responsibility for decisions that I have not felt equipped to make. Like you, I have had experience of things going wrong which, understandably, makes you much more wary about taking any risks.
I sounds like a tough decision. I found the BCC Helpline really helpful when in a similar position. Unlike friends and family, they have no interest in pushing us one way or another.
Good luck, Rattles x