I Had A Pvr Tes On April 2 2015 They

i had a pvr tes on April 2 2015 they didnt call until a day ago April 19 2015 the girl in the office informed me the test was abnormal they gave me the test because after i ran a stress test I said my legs were hurting a little. Now they tell me I have to get a CTA of my abdomin and lower extremides Im really nervous Im a professesional paid firefighter and Im more at ease in a burning building whats this test for