Mama, I know it's scary when things feel different, honestly, I was paranoid about every little change din when I was pregnant! But please see your OB soon, okay? At 16 weeks, baby movements can still be super light and inconsistent, kaya it's hard to tell what's normal or not without a checkup. Your doctor can give you peace of mind in minutes, which is way better than worrying all week! You've got this, and I'm sure baby's just fine, pero let the expert confirm na.