Baby retreating?

Amy • Mom to 4 beautiful girls. 3/3/10, 4/27/14, 4/8/17, 3/7/19.
I've noticed today and yesterday, that my baby seems to be kind of hiding towards my back. Tummy is quite squishy when I sit down. I can still feel her move so that's helpful, but odd that she's sitting so far back for me. Anyone else experienced or experiencing something similar?