Dropped?

OK so the baby has dropped.. what does that mean really? I've heard a lot of different answers and it is kinda freaking me out. Most people have been telling me its only a matter of days and others are saying that it doesn't really matter. I have my doc apt today and so I'm going to ask and get some more info about this whole situation.  One more week of bed rest and then I am done!!! :)  But on the upside I finished breaking dawn. That was a REALLY good book!!!! It makes me wonder if it may have been her last for the Twilight books.  Only time will tell I guess. Im about to start that other book of hers now, The Host? I think thats the name but Im not to sure. Any tips on training a very strong willed puppy? Roxy is a doll and a half but she's very bullheaded,  just like the rest of the family.  Well this should be enough to make Meela happy again. I will post an update tonight after the doc to.