Ay don't worry, first-time mom anxiety is SO real! Yellow urine sa 3-month-old is usually totally normal, pero if it's like a really dark yellow or amber, or kung may ibang signs siya like fussiness, fever, o parang nahihirapan siya mag-feed, better check with your pedia just to be safe. A few of us moms din nag-worry ng ganyan at normal lang naman pala, pero peace of mind from the doctor is worth it talaga!