Adoi, I know lah how scary this must feel, tapi honestly kena check balik with your doc because dating discrepancy ni bisa ada few reasons (maybe ovulation lambat, or timing calculation), tak semestinya ada problem A few of us mum friends went through similar situation dan last-last semua okay je, but some juga kena follow-up scan to make sure beb is growing properly, so don't stress dulu lah. Best is get your gynae to explain the exact reason and monitor closely with another scan in 1-2 weeks, ini is the safest way to put your mind at ease! Hang in there, mama