Arrhythmias?

I am 5'2" and 115 pounds and 14 years old. Every day I run about 1-2 miles. I play soccer 3 days a week, each practice is 2 hours, and each game is between 1-2. I recently broke my thumb, and when I went to the ER, they told me that for a kid my age and size, that having a heart rate of 93 is too high. Am I having arrhythmias or palpitations? I noticed that when I run, I get overheated quickly and I turn pale. One time I got dehydrated and sent to the emergency room. Do I have heart problems, or is something wrong with me?