I'm really struggling with the breast shield sizes. I've looked on the Medela website as far as what's a good fit, and honestly it just doesn't make sense. I've wasted so much money on breast shields and everything just hurts - but then again, I feel like my nipples are so damaged that maybe that's the problem? I started off with Medela 24mm. Read how incorrect shield size could prevent good milk output. So I tried the 27mm. Still hurt. So I shelled out $30 to get the 30mm and 36mm. Same thing. Though the 30mm still doesn't feel that great. Pumping is sometimes agony. I've already had a couple of blisters. So I was reading about Pumping Pals and how great they were - how much less the pain was, and just overall better for milk production. So I shelled out another $30 for those. I've tried each of the 3 sizes and they don't feel any better than the Medela! The only thing is I'm able to save myself a little bit of back pain from having to lean forward with the Medela (last night back hurt loads). I feel like I've wasted $60 which I cannot afford to just waste on stuff that's useless to me. (Different story if they are helpful with this). As I'm exclusively pumping, I know shield size is very important for my nipple health! But I just cannot seem to find anything that doesn't put me into agony. I know my nipples are damaged. Maybe that's the whole problem, I don't know. I just don't know how to fix this without having to stop pumping. I've put a couple of sessions with 4 hours breaks just to give my nipples a little longer before they have to be yanked and rubbed. Anyone else have this issue? Has anyone been able to find a solution or things that have made it feel better? I did start using some olive oil which did help a lot, but the olive oil doesn't seem to do so well with the pumping pals (my kept sliding and would put my nipples in an awkward position & couldn't adjust properly & would get next to no milk out).