Is this baby?

rissa • Sweet rainbow baby girl on her way 🌈🎀💕💗

So I’m 21 weeks now and I swear I feel like she’s kicking me in my butt or something. Is this her or just weird bubbles or something? It’s like she kicks a nerve in my butt or something its hard to describe 😂

Any of you guys know what I’m talking about? 😂