It's bloating. Laura is right . Your uterus is still really low. Your baby is still so very small there is no way it would be bulging your stomach out. As your baby isn't in your stomach it's in your pelvis. Your intestines slow down and things get backed up. Therefore your bloated!
Mines low, and stomach is so hard but suppose every body is completely different
It should just be bloating as your uterus doesn't even start to move upwards until about 12 weeks or so. I'm 14 weeks and am starting to get a very small bump because everything is shifting upwards into place.
I'm 19 and this is my first too I think it's because I was thin so it's more noticeable!
Im 10 weeks and already showing also, I'm only 16 and this is my first pregnancy.