1st time pregnant

Saya 1st time pregnant after ttc around 1years ++ Alhamdulillah happy sangat. Now baru 5 weeks, dah pegi scan tapi tak nampak apa sbb awal lagi. Banyak baca suggest pegi scan masa 8-9 weeks which lambat lagi. Sekarang risau sangat bila baca pasal chemical pregnancy and all. I really hope my baby doing fine. Possible ke utk jadi chemical pregnancy lepas 5 weeks? And ada possible utk pregnancy test tu salah?