Aww sayang, this is something you really need to check with your doctor asap, jangan tunggu, okay? Baby movement patterns are important and doc needs to assess your little one directly. That said, a few of us mum friends pernah encounter different activity patterns at different times of day, sometimes baby tidur, sometimes active, tapi since this is your first pregnancy you won't know your baby's normal rhythm yet. Every baby different! But please jangan self-diagnose lah... get your midwife or OB to do a proper check, do the kick count, maybe ultrasound. They'll give you peace of mind right away. Hang in there, mama!