Hello. I was hoping to get some advise on breast shield fit. I have been pumping for 9weeks and was getting 35-40oz per day. Not sure why but for the last 2 weeks I have only gotten 25-30 oz. I have gone back and forth between the 24mm and 27mm flanges, using the 27mm ones when I was really sore due to a thrush infection. I have read that the nipple should not rub against the side of the flange, but mine does on both sizes. It oes not touch the sides when I'm not pumping. I also think too much areola is getting pulled in, even with the 24mm. I worked with an LCD my first 2 weeks pp because of latch issues and she thought the 24mm was fine, but never observed it while pumping. Today I ordered a set of pumpin pals flanges to use with my PIS pump. Should I try the smallest size? Thanks in advance for any suggestions!