Two days ago I had a  lung test for Pulmonary Hypertension which was breathing in of a radio active gas and an injection plus xrays. My bones and muscles ache , full of gas , fever, chills , not well.  I have a family history , two sisters of a bad reaction to iodine injections.
You should contact your physician to report these symptoms as soon as possible. The type of test that you had does not usually cause such side effects but when the problem being tested for is Pulmonary Hypertension, your personal physician can best decide if these symptoms warrant additional evaluation or observation.