Wiki, you are not irritating. I'm surprised the oncologist would be so harsh. Adjusting to life after a serious illness is difficult. Survivors need support not to be torn down.
Oh IMO "huge" is in the eyes of the beholder when it comes to breasts. And who says "huge" is bad anyway.

Don't let one person's comments drag your self esteem through the mud.

Hang in there...I'll be thinking of you.