I used nipple shields for the first 16 weeks as they were given to me on the first day in hospital. I kept trying without and it never worked. About 10 days ago my DS pulled the shield off and just latched on and I haven't used them since. I thought all was fine but I have had blocked ducts twice now and I know that the latch is not quite right. We often start correctly but then he pulls his bottom lip in. I try to pull it out and half the time this works. Is it possible for DS and me to learn a proper latch 4 months in and does anyone have any ideas as to how we can improve? Thank you!