It’s been three nights since I drank the tea. Three days without real sleep. Three days wondering if I’m going crazy. Three days of hiding my possible descent into madness from my friends. Each night I close my eyes, and I pray for slumber, I beg to be whisked away into a deep and restful sleep. Yet each night, I find myself stumbling into the minds of my friends.

My three best friends and I had decided to make a girl’s trip to a small town in Mexico, excited to roam, explore, and...