Movement or gas? 18+4 weeks

FTM here. I'm pretty sure I've been feeling my peanut kick/move. Everybody always describes it as flutters. But these feel more like someone put popcorn in my abdomen. Or maybe small quick muscle spasms. Im just curious if this is definitely baby or if I'm confusing gas for movement. I've had plenty of gas and these are toatly different. Seems to happen a lot when I'm resting or need food. And it always stops when I try to see if I can feel with my hand or my husband trys to sneak a feel. Just curious.