8weeks with no heartbeat

hi po just wanna ask im 11weeks accdg to this app. but in my ultrasound im 8 weeks pregnant but no heartbeat yet and accdg to doc. my yoc sac is growing too slow.. he also added d daw nya madetect if dalawang cyst ang bilog or baka daw twin ang baby ko... is it normal po? kinda worried specially no heartbeat pa sya.. thank you