Question lang po 1st time mom

hello, I'm 18 weeks &1 day pregnant today also a first time mom. yung tummy ko kala mo busog at bilbil lang mamsh😂 pero as per ob ko, normal ang laki ni baby sa loob. baka same karin sakin maliit magbuntis. kahapon ko lang naramdaman yung pitik sa tiyan ko pero yung sipa base sa research ko, 20-24 weeks pa daw naten mararamdaman talaga😊 don't worry as long as may guidance ka sa ob mo and monitored kayo well ni baby😊