I am 16 years old, and last night at about 8pm I took a Vivarin(caffeine pill) to help me stay awake. About an hour or 2 after taking it, I got in to an argument with one of my friends, and ended up releasing a lot of built up rage to her. I didn't use violence, but I had yelled a lot. My vision started to darken, I started to get a tingling sensation in my arms and legs, and I felt like i was dreaming. I think it was adrenaline or something from the caffeine pill. I had to walk away and calm down because I felt like I was going to faint. After I had calmed down a little bit, I had noticed that my right eye felt like it couldn't open up all of the way. I didn't think much about it. This morning when I woke up, it felt like it was about half shut. I looked in the mirror, and my eye was really swollen. It's from about my nose, to the bottom of my eye, and down about halfway down my cheek, I also have a pimple almost near the middle of the swelling.

Any idea what this could be from, from stress, anger, from a pimple?

I'm really scared.