Strange

Last night, my sister invited me over for a girls party. Being in the midst of a very stressful week at work, I welcomed the distraction and chance to let loose and relax for a few hours. I got there early and helped Bre set up the tent where she and her friends were planning to sleep. I, on the other hand, was sleeping inside because I need a blaring alarm clock to rouse by bottom out of bed at the crack of dawn. I had a lovely time hanging with Bre and some friends. We enjoyed some fruit punch and roasted marshmallows. Okay, okay, maybe there was some vodka in the fruit punch.
Long story short, I went to sleep much later than planned. I had brought my pillow and alarm clock. Around 12:45, I checked that the alarm was set for 5:30 (barf), pulled back the blankets and nestled into bed, looking forward to a few hours of sleep.
Next thing I know, I wake up and have NO idea where I am. Then I realize that I was at my parents. Confusion quickly rushed back as I remembered my bed time routine from a few hours before; I was not in my parent's guest room. I sat up with a start! Looking around, I quickly recognized my surroundings. I was in my sister's room. And it was 5:04am.
I haven't the foggiest idea as to how I wound up in there. At all. Not to mention how long I was in there or why I ventured in there. I've asked my entire family, and no one can help shed any light on this mystery.
I can't help but wonder, has the significantly increased stress in my life caused me to take up sleepwalking? Here's hoping to a restful night of sleep tonight.