Ay mama, totally normal yan! Around 16 weeks maraming tao ang nagsasabi na parang nawala na yung initial symptoms, some of us felt the same way at nag-panic na rin, haha. Your body just adjusts to the hormonal changes, kaya parang "used to it" na siya, pero doesn't mean anything's wrong. That said, since you're worried, best talaga na i-mention mo sa OB mo next visit just para sa peace of mind, they can do a quick check and assure you everything's good. How are you feeling otherwise, mommy? Any movements pa nararamdaman?