Should I be as worried as I am??

I've researched and read what other moms have written, but I am a little scared that maybe my baby isn't growing anymore or something has happened?! I have been to my check ups and everything is great but STILL completely worried! I am 5 ft. 1 in. weighing 102 lbs. and 14 W 5 days pregnant. A lot of forms/blogs I've read say that mothers who are on the smaller and thinner side show much earlier and I'm not showing AT ALL. It has gotten a tiny bit harder right above my pubic bone, but nothing more, I just feel like I'm putting on weight. Pre-pregnancy I weighed 96 lbs I start to think that it's just my craving getting the best of me and not actually baby weight. When I lay down or when I'm standing it's the same thing completely flat. Should I be worried?