How did my belly get so big?

Li
Same shirt an same pants, 14 weeks vs 15 weeks and 4 days. 
Got told my belly is finally rounding out. What do you ladies think? Do I look too big for only 15 weeks and 4 days? I haven't gained any weight at all. So it's not fat lol 
This is also my first baby, but I used to be 282 pounds. Now I'm 224lbs.