Eh sayang, mmg ada possibility jadi girl even if doctor cakap boy! Ultrasound accuracy tergantung on gestation age, angle baby, and doctor's experience, so kalau doctor tak 100% sure, better jangan expect sangat. A few of my mum friends dapat the opposite sex dari what they were told, lol, so memang benda ni boleh happen, tapi chances tinggi kalau doctor dah confirm lah. Just try and enjoy the surprise element kan, best part of pregnancy is thinking "apa ek baby kita"