Ok ladies....first off, everyone needs to try laid back nursing. Look it up on YouTube. Second thing that needs trying is laying with baby as much as possible with bare breasts and bare baby. NO nipple shields during this time. If baby is still a newborn they will crawl to breast and try to latch themselves. Don't force it. If you are looking for one magical latch that will solve all the problems, well it is a learning process. I have seen Mother's work on it for 6 months *yes really* every single day. Ask yourself three things...1. Is baby opening wide for the breast? 2. Is baby getting too hungry to feed properly? 3. Are you RELAXED? Relaxing is vital as it allows milk to flow and your baby responds to body language.
One thing I have seen work a lot lately is something my instructor calls "bedside routine" which is when you lay baby down beside your bare breasts and get the mouth close to the nipple without touching. It puts baby in a different position then they are used to being in and settles them out of the pattern of feeling frustrated in a normal feeding position. Allow baby to search the breast, let them lick, wiggle, refuse. Everything they feel like doing. But do not allow them away from the closeness of the breasts. If you start to let down then let baby lick the milk, or smell the milk, or rub their faces on it to get them used to the smell and taste. A lot of the time they will search out the nipple as the place of the milk and try to latch. If they end up latching then bravo! Try this as many times a day as you can manage to get latching established. It really works in between feedings because baby won't be starved and will want to suckle. Last week I visited a lady who fell asleep with her baby in this position. She has been trying to establish a latch for 3 weeks. She woke up when her milk let down with a gush because in this relaxed comfortable position her baby boy latched and started suckling in his sleep. Since then they have been back to breast for 50% of feedings.