Big Hard Belly Early?

Sabrina • 🎀💖 Little miss Charlie Rae was born on July 4th 2016!! Little miss Delainey Courtney Louise was born on August 12th 2019!! 🎀💖
I'm only 6 weeks and two days and my belly seems that of someone who is like 20 weeks along. Also, it is hard almost like its muscular, but it definitely isn't. Is this a little early for this? Is it weird that it's so hard and I cannot suck it in?