Randy was brought to the emergency room with acute abdominal pain from his office. The pain began suddenly after he felt chills. He has no fever but he does have diarrhea. He also has a bluish white complexion, a blue tongue with a white coating, and a hidden pulse. He was diagnosed with "irritable bowel syndrome". After a day in the hospital, Randy begins to have diarrhea with clear, thin stools, and the pain is gradually relieved. What is the diagnosis for his initial symptoms?