Beatriz Martinez was exercising at the gym one day when she suddenly felt unusually breathless and a little dizzy and got a pain in her stomach.
She stopped and took a minute to breathe, which made her feel a little better. But the pain was still there. Maybe she had pushed herself too hard and pulled a muscle?
"I thought it was the exercises, a muscle ache," says Beatriz. So, she decided to call it quits for the day and drove home.