We just had my 7 week old sons lip and tongue tie fixed yesterday. My nipples are still getting big creases and it is painful to nurse. The doctor said he needs to work on a deep latch obviously. He showed me how to stick my finger in his mouth to check his suckle then nurse. He seems to be fine when checking with finger. I try to position well, sandwich boob into his mouth, make sure lips are flanged I don't know what we are doing wrong. I have sen a LC a couple of times and she always said we were doing fine and latch looked good! Any tips ??