Scared to death!

Yesterday we came back to the motel to hang out before dinner. lexie was following me around the room while daddy and lance were hanging out on the bed watching tv.
I decided to start our car so it would be warming up while we were getting ready to leave. Our room is at the very end of the hall rite next to the stairwell. I thought I could open the door and push the button to start the car. So I opened our door and didn't let it close behind me so I could step rite back in. I went through the door to the stairwell and it closed behind me. I didn't know it would automatically lock behind me. I banged on it for a second but no one could hear me so I had to run down the stairs, go outside, run around the building to the door, wait for someone with a key card to go into the building, run in to the elevator, stand and wait for someone to open it from either coming down or use the key card to go up. I was standing there waiting and wouldn't you know I could hear Lexie yelling for mommy. Not a scared yell, but jut yelling.
I WAS FRANTIC!!!!!
Finally the door opens and I am able to go up the the floor our room is on.
I start running down the hall and I see Andrew. I yell out "is lexie with you?" He gives me this huge o crap look and says "no! I thought she was with you!!!"
I am about in tears. Then I hear lexie again! She is in the other elevator and it was stuck because she is pushing buttons. She is saying "mommy let me out!"
She kept hitting the alarm so the elevator wasn't going anywhere
I kept pushing the up and down button hoping that it would just open but only the elevator next to it would open. I kept thinking "what if it goes up or down and we don't know where she gets off."
Finally I told Andy I was goin to the front desk, but calm him walks over and tells her to stop pushing buttons.
Once she stopped he was able to make the elevator open and there was our little giggling girl.
O my goodness! I have never been so scared in all my life. My heart was racing and I just felt sick.
All evening I just felt horrible! HOW WAS I TO KNOW THE DOOR WAS GOING TO LOCK BEHIND ME. My plan was to just step out and turn around and step back in.
It wasn't Andrew's fault;He thought she was with me.