What is it

Cassie • 🎉🎃🍁🍂 blessed with a beautiful 3 year old boy a 2 year girl and a 9 week girl👨‍👩‍👧‍👦
A few times today it's felt like I'm having like bubbles being blown in my tummy from baby moving, I'm 18 weeks 5 days does anyone know what this could be X