Saggy lower belly...

Brittni • Pregnant with our rainbow baby! Team Pink! 💗 EDD 9/16/2015
Ok so this might sound like the dumbest question but I've noticed my lower belly is saggy. I wasn't tiny to begin with but not overweight by any means (size 8-10). The top of my belly is round and firm and then bam saggy lower belly. Anyone else?