I am same as you, for the first week, my nipple was injuried several times and not yet "上奶", the nurse said it may happen even your feeding position is correct since some BB suck very heavy. My BB suck very "狼死", I don't want to see blood coming from his mouth, so I pumped out + formula. After a week, I tried to feed directly, and it seems OK so I think I have "上奶". Now my BB is 6wks old, my nipple are hurted sometimes, so I need to stop for a day may be & pump out. Try hard + add oil!!!!!