When does preggo belly get hard???

Hey guys! I am 16 weeks along.  I was walking into my bathroom at work today feeling confident as hell and noticed that my little baby bump has some serious jelly belly. It's more "jiggly" now than before I was pregnant! I am not overweight but I definitely had a little tum before everything. I feel like my uterus is just pushing the fat further out!
When did everyone else's stomach start to get hard and more pregnant looking??