GD and losing weight

Ma

So I took the 3hr GD at 28 weeks I’m now 33 weeks. I haven’t gain much weight. I started at 214 and I’m at 226 (12lbs) but they are so strict with me saying baby is already weighing 4lb 14oz at 31 weeks. By then I was weighing 229. Do you think it’s just me losing the weight or is the baby losing weight as well?? I’m so confused. They don’t want a big baby. I keep trying to be good but now I’m worried that I’m just the one losing the weight, and baby is still gonna be huge. I have another growth US Thursday. Should I be worried? Does anyone else have this issue? Everyone that sees me keep saying I look too skinny!