Ay alam ko yan! I had the same thing during my second trimester, and honestly a few of us moms talked about it, it's usually just the skin stretching kaya nag-itch, especially sa tummy at legs na lumalaki. The hair regrowth thing could be part of it too, kaya try moisturizing regularly (I swear by keeping lotion handy!) and maybe gentle exfoliate nalang instead of frequent shaving para less irritation. But if it gets really intense or doesn't calm down with moisturizer, better check with your OB kasi sometimes pregnancy itch can be something they need to monitor, better safe than sorry! How far along are you na?