My baby is 4 weeks old and she seems to be getting more lazy with her latch. What I mean is that she now doesn't open her mouth very wide before latching. I end up having to unlatch and relatch her, sometimes more than once, before she will open wide enough. She didn't used to need this.
Also, sometimes she makes a clicking type sound when sucking and I think this is related to the latch. If I mash my breast together, that seems to help too, so I also thought it might be because my breasts are relatively small.