NO HEARTBEAT

Hi mommy i just want to make ask ngpaultrasound aq knina and my baby is already 6weeks no fetal heartrate na narinig ang OB ko and she said me internal bleeding ako underobservation ako bblik aq ng feb 16 par icheck if me heartbeat .. is it possible ba mga ka mommy na wala pa mrinig na heartbeat kht naman 6weeks na baby ko ????