Sayang, kaler putih itu normal je if it's clear and tidak bau, but kalau ada sakit perut sekali, better play it safe and check with your doctor la, bisa jadi hormonal changes je or something yang perlu perhatian. A few of my mum friends experience the same thing during pregnancy or certain times of the cycle, tapi perut sakit tu tak boleh ignore. Go see your gynae just to be sure, ok?