When your anxiety is expressed with physical symptoms, that is called somatization. The other name is irrelevant to your situation and refers to a group of medical disorders with unknown origin.
A Somatization Disorder is a type of a Somatoform Disorder. Other Somatoform Disorders include Conversion Disorder, Hypochondriasis, and so on.
Please be very careful about this diangosis. I have heard from many people who have been misdiangosed with a somatoform disorder who actually had an "organic" dissease. I am sure that I would have been diagnosed with a somatoform disorder if I had not insisted that doctors persue a neurological explanation for my symptoms. I was finally diagnosed with dysautonomia at the Cleveland Clinic. It took me a year and a half, 6 neurolgists, and 2 cities before I got a diagnosis.
Do your research and trust your instincts!