Hai mama, aku paham confusion mu, lagi-lagi third pregnancy so paham lah normal macam mana sebelum ni. Honestly, dating discrepancy ni boleh jadi dari beberapa things, bukan semua orang ovulate on day 14 like textbooks say, so LMP calculation boleh meleset especially kalau cycle irregular or takde confirm exactly kapan implant; second possibility tu measurements scan itself boleh ada margin of error, terutama early pregnancy. Yang bagus here is ada heartbeat already, so at least growth progression tu jalan (even kalau slower dari expected), tapi sebab this is your first time experienced pattern macamni, better check dengan doktor ye, maybe dia boleh do another scan in 2-3 weeks to track the growth trend and confirm everything is progressing okay, rather than panik based on one measurement yang mungkin off.