I'm 15 weeks and 2 days and not showing

Kirby • 22. Can't wait for my baby boy to get here! Hurry up August!
Hello everyone, 
I am fifteen weeks and two days pregnant today and I am so worried because I am not showing yet! Everyone else around me seems to be pregnant and are around the same couple weeks as I am and they have that nice round tummy. Nothing on me looks different and I feel so normal because of my lack of symptoms that it just makes me nervous! Plus I had a miscarriage in July so that makes my nerves even more on edge. Any words of encouragement?