Teddy has lost 3 baby teeth already and I have yet to see any of them..I think he swallowed them or something. I just see the empty spaces in his mouth. But now I notice that he has 4 more loose teeth! What should I do? I really want to keep one for memory but it doesn't matter if I can't. I just want to make sure he's fine. He's 5 mos. Any advice? Does it hurt them when their teeth fall out?