What Does Pain In The Lower Abdomen On The Right Side Indicate?

My 11 year old daughter was just at volleyball tryouts, she is physically fit, but exhausted from 3 days of tournaments, practice etc. 20 minutes into tryouts, she was unable to take a deep breath, was wheezing, nauseous and dizzy for a few moments. She took a break, cooled off, sipped water and went back onto court for another 15 minutes..complained then of pain in very low right abdomen. Large intestine area?? She is breathing fine now (an hour.5 later) and no longer dizzy. She seems a bit concerned with the pain in her abdomen. No history of allergies, breathing issues, or other chronic issues or diseases. Not overweight. 5 5 140 lbs. Dancer, 4 hours/ week, volleyball, 4 + hours a week, student. Skier 8 hours week. So wondering what the pain might be? She has had her period for over a year. It is about that time for it to start this month...wondering why she had breathing issues out of the blue? Any suggestions or direction would be great! Thank you -