I have been BFing for the last 16 months and only one feed a day for the last few months. In the last month or so I've noticed that my nipples look "squashed." I don't know if my nipples have been stretched and then they get squashed into my breasts when I wear bras/shirts or if it's something else. Either way, it wasn't like this before when I fed my daughter. In addition, I always did lots of expressing and never had this issue and that really stretched my nipples. There's an actual line on both nipples where the nipple folds into the breast. I hope this makes sense. I guess I just wanted to see if this was normal or if I should get it checked out.