question: hello, my sister recently had some abdominal pain and sore back, so thinking it may be a kidney stone or infection, (she had that happen after her first child) she had an ulltasound performed. they found her liver to be enlarged. last night she went to emergency with a racing heart and poss an anxiety attack. I believe the doctors said she had a heart arrhythmia. I do think she is under a lot of stress. My nephew is 3 and my niece is 6 months so she has her hands full and is thinking of selling her house. Is it possible that this is just an anxiety attack, or are these two symptoms possibly something more dangerous.