Why do I always sleep like this?

Okay, I sleep very weird. From what my mom tells me, I kick during the night, and sometimes I talk in my sleep. I slap my hands around all over the place and stuff. AND, a bomb could explode right outside my house and I would never know, that's how deep I sleep. Like, everyone in my family hears thunderstorms at night and I wonder what they're even talking about. Sometimes when I fall asleep on the couch my mom wakes me up around 1:00am to go to bed and I walk into my room and get in my bed like normal and then the next day I have no idea what so ever that I even did that. It's like I heard her in my sleep but I wasn't conscious of what she was saying. And a couple times, I was sitting up in my bed and sleeping, litterally. I was sitting criss cross applesause or whatever WHILE I was sleeping. And then another time I was on my hands and knees while I was sleeping. Why am I like this?? I'm 12 years old and I don't have any sweets or any food 2 hours before I sleep, so that can't be it. Should I see a doctor?