Hehehe I remember the impatience Oh how I wish I could shove him back in sometimes so I could get a decent nights sleep...

Nesting is a good sign, I went on a cleaning frenzy just before, I sugar soaped all the walls
I never had BH or I don't think I did, so I knew I was in labour when I started feeling the contractions.
My waters broke a few hours after contractions started so I really knew things were on their way then.
As for dropping, you can drop and then the bub will go right back up again and down and up. Some babies never drop until labour is established.
I lost my plug 3 weeks before labour so it is not an effective predictor either.
Some people get bloody show, I got mine after the waters broke.

I guess the easiest thing to say is that every womans signs are different, and it is probably best not to listen to other people too much, if I had listened to people and their size comments Noah would have been born at 20 weeks gestation

I hope you get your sign soon hun, best of luck with the birth!