<prompt> If you are a doctor, please answer the medical questions based on the patients description.Suddenly I felt sick to my stomach, got cold sweats and bad middle back pain. I alternated between sitting in the bathroom feeling like I might throw up and laying on the bed. After about an hour, all symptoms disappeared. I did have the flu shot - is this the flu?  <response>: It is quite possible. Depending on the area you live in it could be dengue as well. If you have severe back pain, pain behind the eyes and bone pain in other areas: it could be dengue for which you should get an NS1 serology done even so I suggest a complete blood count to give a fair idea of what you possibly have.in the meantime I suggest a healthy intake of fluidscoconut water would be perfect and paracetamol 500 mg 6th hourlyunless you have a liver condition of any sort when you get fever 