Ay, totally normal yan, mama! 13 weeks is actually when maraming mums notice na biglang bumaba ang gutom compared sa first trimester, yung crazy cravings and constant hunger parang nawala lang bigla. It's usually just hormonal shifts, and basta naman you're eating when you do feel hungry and getting nutrients, baby's doing just fine even if you're not demolishing food like before. Some mums I know were worried too kasi parang may something wrong, pero after a few weeks bumalik na ang appetite, weight gain and hunger talaga hindi linear sa pregnancy, it goes up and down.