Sayang, ni memang kena check dengan doctor terus, jangan tunggu, pergi je emergency or your gynae clinic sebab need proper scanning dan assessment. 8 weeks pa, sometimes cardiac activity baru jelas visible depending on scan type sama position baby, tapi kena expert yang tengok properly. A few of us mummy friends pun dah experience situations macam ni, some turned out fine, some needed follow-up scans, but the key is getting checked by your own doctor who tahu your full history, okay? Please don't worry sendiri, go get professional eyes on it now, dear.