Oh dear, low HB masa pregnant memang kena jaga betul-betul, especially dah masuk 19 weeks ni. Berat tak naik langsung pun something yang doctor perlu tahu, sebab setiap pregnancy memang berbeza-beza kan. Saya rasa elok sangat kalau you bring this up with your doctor or bidan at your next visit, or even earlier if you rasa tak sedap hati, they will know best how to help you and baby. Semoga everything goes smoothly for you, take care ya.