I recently had a tooth extracted given one injection for numbing. It was extremely painful, While waiting for my son to pick me up I felt worse and worse,,It got to the point I couldn't talk or stand up. A lady ran and got a nurse. They said I was extremely white. I was put on a stretcher with my head down and feet up. Put on oxygen..In the far distance I could hear them talking but could not open my eyes or talk. I was cold and clammy. My pulse was 142, BP 168/96 and I had begun to shake in my fingers first then going up my arms. I am not a diabetic, The doctor told them to get sugar in me stat that I was hypoglycemic. What would cause this and should I consult my primary care doctor?