Do baby movements feel like gas bubbles?

I know you can mistake gas bubbles for baby movements but do baby movements feel like gas bubbles? I'm 16 weeks laying down right now and keep feeling little bubbles where baby is, but not sure if I'm feeling the baby or not. They're so subtle and don't scream "baby movement" to me but I'm a FTM so I guess I wouldn't know!!! So I'm just wondering? What do the first feelings actually feel like or the feelings at 16 weeks?