Aww mama, jangan stress sangat lah, BMI 20.9 tu normal healthy range, dan 500g naik pun dah bagus! A few of us moms went through the same thing dalam trimester pertama sebab morning sickness, tapi usually lepas 4 bulan ni rasa lapar balik. Since you're getting nausea kalau makan banyak, try eating smaller, frequent meals instead, macam 5-6 kali sehari dengan portion kecil, and foods yang high-calorie tapi easy on the stomach like milkshakes, yoghurt, nuts, atau soup. Tapi sebab weight gain during pregnancy penting, better check with your doctor or midwife to make sure baby okay dan to get personalized advice based on your situation, okay?