Sayang, kalau ada concern pasal degupan jantung baby, please go to your doctor atau hospital jangan tunggu, memang kena check dengan proper scan dan expert assessment. Aku tak boleh bagitahu what's normal ke what's not dalam situasi ni, tapi I know a few of my mum friends yang ada different pregnancy journeys, timing ultrasounds dan detectable heartbeat memang boleh vary. Tapi seriously, don't guess-guess sendiri, your doctor kena monitor this closely with proper scans. Go see them as soon as boleh, okay?