I have read a lot on this forum about hospital grade pumps. What is considered a hospital grade pump?? I have a medela pump in style advanced. I am EP now and my nipples get sore and it hurts by the end of the day. I pump on the lowest setting. Should I try a new pump or different flang sizes? I get good output so I am hesitant to try something new I just don't want it to hurt anymore. It doesn't hurt when I nurse only pump. I am trying to get LO back to the breast. It has been a long road through a never-ending nursing strike, biting, highly distractible and now nipple confusion. He nursed exclusively for 3 months so I was surprised that he has nipple confusion now and I now have to use a nipple shield and I never had to before but that is a whole other story.