Hi @2MC,
I really don't have much more to add than whats already been said. However, student doctors are not really supposed to see patients without supervision. Nor should they be giving you any form of diagnoses without getting a reg or consultant to check first. Radiated breasts tend to always feel firm with lumpy bits (mine does anyhoo). I often wonder how the heck they could feel any changes when I can't and belive me at the beginning I poked and proded that thing all over the place for months :)
I would be having a word with your hospital. Student doctors are just that students not doctors. Don't forget you are well within your rights to have a chaperone for breast examination. This is generally an experienced nurse who probably would have given that student a good clip around the ears for telling you anything like that.
Hope you feel better soon lovely. Trust your specialist sweets.
xoxoxox