I need some mommy advice, I'm a ftm!

Cortny • I'm 20 years young, I'm married and pregnant with our first little baby! I'm so excited to be a part of this community! I'm due October 13th! :) ❤ I hope it's a girl!
I have had cramping in my lower abdomen since two days ago. I woke up rather early this morning becuz it hurts when I change sleeping positions. I'm 16 weeks tomorrow. I'm not entirely showing yet. Is this ligament pain from baby about to show? Is the little one just making room??