Sometimes when my 5 week old is nursing, she'll let go frequently b/c the nipple suddenly goes almost (but not completely) flat. Sometimes it goes almost-flat a few minutes into the feeding, sometimes it just stays almost-flat from the beginning of the feeding. It happens with only one side at a time, and I believe it has happened on both breasts. It started at about 4 weeks. She's having a really rough time nursing when this happens. It seems to be happening more frequently and it's making feedings very difficult.
Any idea WHY it's going flat and what I can do about it (other than manual stimulation) One note--- I despise nipple shields and want to avoid one at all costs.