I don't look pregnant and it makes me want to cry

Okay so this is my first child. Before I got pregnant I weighed about 170-180 pounds. I'm now 20 +4 and I feel like I look that same as I did in the beginning. The first picture I was 4 weeks. What do you think? I wish I just had a cute round stomach lien everyone else and you could actually tell I was pregnant and I didn't just look fat. I want to take maternity pictures but I'm afraid I'll never look pregnant