Aiyo, week 12 tapi fundus dah week 14 size, memang ada orang macam tu! Sebab-sebab macam-macam lah, bisa dating salah, bisa twins (dah scan?), atau memang uterus expand faster je kat some mummies. Tapi sebaiknya chill dulu and let your gynae monitor, dia confirm kalau semua okay especially kalau dating scan dah clear sebelum ni. A few of my preggy friends had similar readings and doctor just tracked more closely, nothing serious, but definitely confirm dengan doctor yours lah, jangan worry sendiri