Doubt

19 weeks in and I have to say I am very much enjoying my second trimester.  No more nausea, manageable heartburn, and increased energy.  It's great.   I am, however, suddenly feeling a little bit of doubt.  Without those sure signs of pregnancy I felt early on, and with a barely there belly and no feeling of movement yet, I started to question whether I was still pregnant.  Of course, I know I am but this in between stage is such a funny place to be.   I know someone who is due 9 days after me and when I saw her, all I could do was stare at her very obvious baby bump.  Then I started to panic.  Where is mine!?  I have a 20 week u/s coming up so I am sure this will ease my mind but in the meantime, can't I just feel a little kick or something!?