I am having a difficult time to pick my brest pump. I have considered many features battery operated etc. Any ways I wanted advice on how to not get my nipples to be permanently enlarge from breast feeding/pumping. I have extreamly sensitive skin already and I know I will have trouble bresr feeding so I am not sure what to do? I also have mamy friends that have said there breast have changed permanently, like nipple sagging, from pumping and they regret even doing it. Do you have any suggestions? Thank you.