for the third time in two months, amber's husband rushed her to the hospital emergency room because she thought she was having a heart attack. her symptoms included a racing heart, weakness, feeling faint, and feeling as if she were unable to breathe. although her doctor says she is physically healthy, amber lives in fear of another attack. amber is most likely suffering from which psychological disorder? group of answer choices panic disorder generalized anxiety disorder obsessive-compulsive disorder specific phobia