I would call livestrong and komen and ask them to put you on their "do not solicit" list. And I would tell them you're offended by the fundraising efforts, since you're just trying to get help right now.

If it helps, my neighbor had a mastectomy 5 years ago. She was pretty sedentary at the time, but a couple of years later she joined a gym and has been actively working out since then -- frequent cardio and weight training sessions. I think she has some shoulder/arm weakness on the side where the mastectomy was, but otherwise she is doing well and in fact only needs a mammogram once per year.