The bump?

Samantha
So I will be 15 weeks tomorrow. Before I got pregnant I was 157 pounds. Now I'm at 164. But I'm wondering about this baby bump. Now I can suck it in, and there looks like there's nothing. Or I can just let it all hang out and there's something there. I'm told, by my boyfriend, that I'm not supposed to be showing yet, so what I'm seeing is just fat. 
Any input?