My son is 18 he has all the signs of a hot appendix but the doctor said that he doesn't have a fever or his white blood cells aren't high.

Apendicitis. There are other conditions that can mimic appendicitis. One condition is mesenteric adenitis, where lymph glands swell in the abdomen or as one of my patient turned out having crohns disease. Maybe you can convince your doctor to do an ultrasound or mr i of your appendicial area.