My DD is 17 days old and we've finally turned the corner on bf'ing! She nurses great on one side, the other side is still painful but I believe it's due to a shallow latch. However today I noticed that as she prepares to suck, while on the good side, it's like a quick quiver before she moves her mouth to start sucking... Any idea what tuis could mean? Is my breast too heavy in her mouth and her jaw is tired? This happens any tie during the feeding.