I've been having the symptoms of severe abdominal pain for the past week my doctor did blood work an ultrasound and a ct scan and we ruled out appendicitis, ovarian cysts, and pregnancy. I was put on a antibiotic and a prescription for pain, it's been two days and now i have the symptoms of bloating, headaches, slight constipation that is black in color, frequent need to urinate, loss of appetite, fatigue, and nausea along with the abdominal pain. I was wondering if you could tell me what these could possibly be symptoms of