adjective

affected by or deriving from wildly uncontrolled emotion.

Janet became hysterical and began screaming

overwrought,emotional,uncontrolled,uncontrollable,out of control,unrestrained,unrestrainable,frenzied,in a frenzy,frantic,wild,feverish,beside oneself,driven to distraction,in a panic,agitated,neurotic,mad,crazed,berserk,maniac,maniacal,manic,delirious,unhinged,deranged,out of one’s mind,out of one’s wits,raving,in a state,swivel-eyed