Aiyo, cirit pada trimester ketiga tu memang common, but kalau disertai dengan baby gerak banyak kat bawah, ada baiknya check dengan doctor cepat-cepat especially since you're a first-time mum and worried lah. A few of us had the same thing dan doctor just said it was normal Braxton Hicks or baby position changing, but there's kencing manis during pregnancy or other things yang boleh cause it, so jangan ambik risk. Hang in there, and do see your OB soon okay, better safe than sorry!