So nervous 😑

Hey ladies. Just wanted to stress out a little. I am almost 15 weeks, and have absolutely no bump! I had one a few weeks ago, that I'm chalking up to bloat/digestion issues, because now my cute little bump is back to flat! I feel like there is no way a baby can be in there! I don't look like I'm growing and I'm worried that means something is wrong. We heard a heartbeat at 13 weeks that was healthy, but I'm still worried out of my mind. Other than crying a lot and being tired. . . I hardly even feel pregnant. 😞 I am just hoping everything is okay. I don't know when we will be in to see the doctor again.