39 weeks 1 day- sudden heartburn?

Emily👼13/10/18 🌈 🤱 17-11-19💙

Ive gone through my entire pregnancy and not had it. Now all of a sudden its come on and its awful!?! Could this be a sign labour is near? Nothing else makes sense.... anyone else had this? Also lost my mucus plug today and yesterday.

So fed up now :-(