Waking up less bloated?

Is it normal to wake up and not feel pregnant? I know my little baby is in there because of all the pinching and pulling that happens while I lay down but I wake up and my belly is smaller than the night before.. 16w and I still don’t have a much of a bump 🤰🏻🤷🏻‍♀️ This is my first baby so I’ll probably start showing much later?

Also is it normal to feel pinching while laying down in bed I use all the pillows in the world trying to get comfy and nothing works 😅🙃