Did I masturbate unintentionally

Hi! So this morning I felt something in my lady parts and I just let it go on, normally I would wake up and go do something. It's like I was moving my labia in and out like if I had hiccups but down there, it feels weird, it doesn't hurt. Am I masturbating? I'm virgin so I don't know what's going on and I'm scared of asking my mom :/ or sister.