what does it feel like for baby to move at 20 weeks?

I've been feeling like these poping/thumps below my belly button all morning but I'm scared to say it's the baby cause it could also be gas.... lol 
How do you know it's the baby?

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors