Could this be a sign labor is on the horizon?

I'm currently 32 weeks and I've been pooping a couple times a day since the last week. I've had no diet change except started a iron pill 2 weeks ago (which should be constipating me). My whole pregnancy I've had to drink prune juice so I could poop every 5 days or so. So this is very strange that I've just been going on my own all of a sudden. I've been extremely emotional and crying lately. I've been nesting like crazy but also had zero energy and just extremely uncomfortable. These all seem like signs that I could be having baby in just a couple weeks. What do you think?