Anyone go into labour randomly with no signs?

Jo

I'm 39 +3 and have had no signs of impending labour! I haven't even lost any of my mucas plug at all yet. I've had no pains, back ache and I still feel like I haven't dropped yet though my midwife says he's engaged into my pelvis.

Everyone keeps saying "any day now" but I really don't see it being close I feel like I'm going to go over.. I was hoping I would get some signs in advance to prepare me for labour as I'm quite scared!