<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been feeling very sick for the past few days. I have been experiencing a lot of nausea and my appetite has been decreasing. I also have a sharp pain in my lower abdomen, and its been really bothering me.  <response>: Based on the symptoms youre describing, it sounds like you may have appendicitis. I would like to conduct some tests to confirm this, but we should take action fast, as untreated appendicitis can be life-threatening. 