Sayang, perut mengeras tu memang biasa dalam pregnancy, tapi kena sure mana jenis hardening, kalau kerap sangat or ada sakit, kena pergi jumpa doctor cepat-cepat ye. A few of my mum friends also experience Braxton Hicks (fake contractions) towards the end, tapi yang penting, jangan delay checkup if you're worried. Better safe than sorry!