question: Hi we are now in a foreign country, Colombia on vacation and about 2 days ago my sister got a fever, she was throwing up and her fever was getting worse, we took her to a doctor and they gave her an IV with aspirin for her fever, and a shot in her butt, which they assumed was an infection. Now 2 days later, she has a fever only, and a fast heart beat, we don't know if we should take her to the hospital or not? She is 12 years old and her heart rate is 140 bpm. Help us please