Huge bump at 10 weeks

Mi

So I think my bump is huge! It’s baby #3 so I expected to show a little sooner and I’ve been bloated, but now I’m sort of nervous. I’ll be 10 weeks tomorrow and my belly looks like im 6 months preggers. WTF??? I had an ultrasound and only 1 baby was seen. Could one be hiding? Is this normal? I saw something on Google about excessive amniotic fluid. Babies 1 & 2 I couldn’t wait to get a bump. Now I’m freaking out.