Has anybody else felt a little bump on their baby's chest? My daughter had like a bump on her nipple…

Has anybody else felt a little bump on their baby's chest? My daughter had like a bump on her nipple so I took her to the Drs and they said that it will shrink and it's normal but yesterday I touched it again and it's like a little ball. It's not supposed to grow its supposed to shrink!! I'm so scared and worried about her like what if it's dangerous 😢🙀 hopefully the Drs can figure out what it is on Monday cause I'm flipping the fuck out