Worried in 2nd trimester

I'm kinda freaking out a little. I havent felt my baby move yet I'm 16+3 with my second. I also feel very different. Like now I dont get super hungry. It just feel like normal me where I can go hours without eating. Before I had to something almost every hour.

Luckily I have an ob appointment tomorrow but part of me feels like there wont be heart beat anymore.