Xanax and stiff

Seeing as im only 15 I didnt know how bad it could be. I was at my friends house and her uncle left the bottle in her room on accident. Befor he could relize he did that we snached the bottle up and took out a few. We washed them down and not too long after he came back to get the bottle we acted innocent. I started to feel dizzy while I was playing my video game. My neck was getting a little stiff too. My mom came to pick me up and I got in the car showing no emotion at all. I fell asleep in the car and when I got home I fell on the couch and fell asleep again. My mother told me to go to my room and I slept from 7am to 6:30pm that night. When I woke up I was suprised at what the time was and I called Mindy and she said she was asleep for two hours. I think there is nothing wrong with it if you dont take it often. If I was ever to take it again I would be really sleepy so it would knock me out.