GymGirl loses a tooth

So yesterday we had a major milestone for GymGirl; she lost her first tooth.  This should have been a happy occasion but instead it ended in tears.  You see GymGirl swallowed her tooth!  She was eating her frozen gluten-free donut (she prefers them that way) and did not notice the tooth had come loose.
I'm not sure how to feel about the whole thing.  One it is funny.  She swallowed the tooth!  However, this marks the start of kid-hood.  She's four and a half!  The time has flown.  I thought I had more time!  She even has a second one that is loose!