Hi alice77, i asked the exact same question when i was preggas....

https://www.bellybelly.com.au/forums...i-nervous.html

https://www.bellybelly.com.au/forums...ly-labour.html

(sorry not 100% sure i put those links in right..i'm hopeless with computers lol)

My bub was engaged from 31 weeks! i was so sure he would come early but he came 40+3 go figure. I guess they come when they're darn ready not when we want them too Not sure about the smell but i had a lot of extra 'stuff' down there from around 36 weeks and then started losing my plug around 38 1/2 weeks. Lost the rest of my show in early labour (was only blood tinged once i was in labour, sorry tmi )

HTH