Not showing...

I'm 13 weeks 4 days and not showing. This is my second pregnancy. And I figured I would show sooner this time around. I've always had that 'pooch' on my lower belly so it just looks the same as always. What really gets me is when I lay down, my stomach is flat and there is not that firmness of the uterus like I felt last pregnancy. I'm really worried because I haven't been to the doctor yet (working out insurance issues) so I really don't know if anything could be wrong. But then I see those shows with those women who didn't know they were pregnant and didn't show so I don't know. Am I just freaking out for no reason?! :/