Scan Baby 10 Week

Hai momies sy ad soalan.. Sy baru balik dr scan baby kt Kk... Klu ikot tarikh last period sy dh 10 week... Tapi tdi scan kantung baby ad.. Tp heart beat baby xnmpk lagi... Bila scan kandungan sy bru 9 week.. Mgkin sala tarikh.. Rase down kejap bile doc ckp risiko sb xnmpk jantung baby ?