Ay, normal lang yan for 8 weeks, mama! At that stage, baby's heart ay mabilis talaga, usually around 160-180 bpm, kaya wala kang alalahanin. But if your OB said something different or kung may concern ka, better ask her directly sa next checkup mo para ma-ease your mind. First pregnancy is such a rollercoaster ng questions, di ba? A few of us mums always say na basta ang OB mo ay okay with it, okay na rin kami. You're doing great!