Ultrasounds at KKH subsidised for GD patients

I am wondering if KKH does ultrasounds for visits at week 32. My growth scan was done at week 28, baby was progressing well then. I was diagnosed with GD and I have been keeping to a strict diet. My weight dropped by 3kg in the past 3 weeks since the diet and I am concerned about my baby weight and whether he's getting enough nutrients. My overall weight gain since start of pregnancy till now is only 3.3kg. I wonder if any mummies can share their experience?