Lauren Scares us to death!

We have a house alarm we set every night. Tonight, around 12:40 a.m. it went off. I jumped out of bed and turned it off thinking my dad must have opened one of the doors to go outside to get something out of his car. I checked the front door and it was unlocked. So, I walked upstairs to see if my parents were in bed & what had happened. My parents were fast asleep...so, I went into Taylor's room to look out her window as she has a great view of the front yard/street. Nothing seemed out of the ordinary but I was feeling nervous because it has never just gone off for no reason. So I checked on the other kids and went into Lauren's room...she was gone. I panicked and called for Dave. Our conversation went something like this:
Me: "Lauren's gone!"
Dave: "What do you mean?"
Me: "She's not in her bed! She's not here Dave!"

Dave ran down stairs and went out front. I followed...immediately we could hear her crying. She was two houses down in our neighbors front yard wandering around crying hysterically. We called to her and she didn't respond. Dave ran to her and picked her up. We asked her why she was outside and she mumbled something that did not make any sense. She was sleep walking and was not awake. He carried her up to bed and we tucked her in again.

So, now I can't sleep (it's 1:20 a.m.) and I am a nervous wreck thinking about all the "what ifs"! I am SO thankful that #1, we set the alarm because usually when we have guests we don't and we did not hear the door open; #2 we checked all the kids rooms. I feel like Heavenly Father was really watching over us tonight. If we hadn't set the alarm or checked on everyone, who knows what would have happened...she could have been wandering around all night. She is our first sleep walker...wow, what a night!