Eh sayang, I think you need to see your doctor pakai cepat to clarify what that dot is, honestly tak boleh guess-guess pasal heart, kena dengar directly from the specialist. A few of my mum friends had similar worries during detailed scans and it turned out to be nothing serious, but some cases memang need follow-up, so don't stress yourself lagi sampai you get proper explanation from the doctor okay. Mana rumah sakit you scan? Usually they dapat explain properly apa itu and whether baby kena extra check or not, stay strong, you're doing great by being proactive!