40 weeks lost mucus plug 3 hrs ago... no change in contraction?...?

So I'm 40 weeks tomorrow and today I lost my full mucus plug, don't they say labor usually starts within 24 hours since I'm now due? I lost bits and pieces at 37 weeks but I know the plug can rebuild itself... but now that I'm 40 weeks I doubt that will happen right? There was no blood or streaks in the plug... just mucus. At full term when you lost your plug, how long until your labor started? And do I HAVE to have bloody show also? I've been having cramping and braxton hicks (nothing new though)... THANKS!