Your roommate is acting very strangely. although she has not slept much in the past few days, she says she is on top of the world. she also took all her savings and invested it in a questionable financial venture. this period of non-stop activity has lasted for well over a week and is in sharp contrast to the depression and fatigue she exhibited earlier this semester. your roommate is exhibiting symptoms of bipolar disorder. generalized anxiety disorder. panic disorder. dissociative identity disorder.