Daniella, a thirty-two year old history instructor, was in her office preparing notes for an upcoming seminar presentation when she was struck with a very sudden and intense pain in her side and lower back. she remained at her desk, breathing deeply, and the pain began to recede. five minutes later, the pain was not as severe but daniella is still uncomfortable and decided to call her physician. daniella described her symptoms to the doctor's receptionist and made an early afternoon appointment. one of daniella's colleagues drove daniella to the doctor's office. while on the way to her appointment, daniella experienced another bout of severe pain and began to feel nauseous. the pain seemed to be spreading into her lower abdomen and groin. explain what is the problem.