I'm 16 weeks and I'm scared that my belly isn't as big as it should be. I'm still wearing non-maternity clothes and you really can't tell by looking that I'm unmistakably pregnant. I'm definitely bigger than I was pre-pregnancy, but it still doesn't look like a "pregnant belly." This is my 1st pregnancy. Dr. said at my 12wk check-up that I was growing on track at that time. Anyone else not very big at this stage? Do you think this is abnormal?