Weight dropping

I lost 3 kg in 5 weeks during 1st preg 1st tri due to lost of appetite and morning sickness. Gynae said bb growing well coz it sucks all my nutrients in my body... now in my 2nd preg 1st tri also lost weight due to morning sickness. But a blessing is that u wont gain too much weight throughout the preg and yet bb still grows well, then u dont need to exercise to lose weight after delivery. Coz with breastfeeding plus waterbag and bb weight off your body, u can go back to your pre pregnancy weight within 2 weeks. My gynae said as long bb growing well, then no issue. U just take more meat and protein to boost yourself.