Who are you and what have you done with my newborn

Something happened in the last week and suddenly there is a BABY! IN OUR HOUSE! No longer is she a newborn. And one day she fit into size 3-6 months clothing, and then the next day I couldn’t get the snaps to close. So now we’ve had to move on to even bigger clothing. Jon was passing her to me in the middle of the night to feed and he threw his back out! Kid! Slow down!