I'm about 7 weeks 5 days pregnant, and I think I'm already showing... Possible?

Seriously, it weird because I've heard you dont show untill you're about 3-4 months. This is my first pregnancy. I have only gained about a pound or two but the area below my belly on is already protruding. Even my fiance keeps telling me aww look at your tummy. I'm like geez, I'm not supposed to be showing yetttt lol. So I guess my question is is this possible? Why am I getting a belly so early?