Polyhydramnios questions!

So here’s a pickle. I’m 32 weeks exactly. I went to the doctor today and was told I was measuring small. Less than 31 weeks. The ultrasound revealed that the baby is actually bigger than average, and that I have more amniotic fluid than normal. Based on the baby’s measurements, I should be a lot bigger than I am. Based on my measurements, he should be a lot smaller than he is. It doesn’t make sense. He’s a very active baby with a very strong heart. They said everything looks fine with the baby (except for the fluid), but they can’t explain why I’m so small.

My blood sugar is okay, my blood pressure is low, I’m well hydrated... So they have no idea what’s causing me to have so much fluid and yet be so small? They sent me to get lab work done to check my pancreas and liver. Of course, I did the worst thing possible and googled what happens when you have too much amniotic fluid and now I’m more worried than before. Anyone experience this? What should I do?