My belly has got hairy too, I started noticing it when I was 11 weeks and OH said that I'll be having a boy because of the extra hair, and he was right! I've plucked a couple of the worst offending hairs on my nipples and below my belly button and they haven't come back since, but I'd say leave them as they are because they're meant to fall out once baby is born.
I've also had to shave my existing shave-zones more regularly (my legs have never been this hairy), and I have noticed the odd dark hair coming in on my face, but again plucked and they haven't returned.