I have a co-worker who suddenly has become a person we don't know. She has made inappropriate comments, screamed across the hallway with leadership in our office, has shown body parts making some inappropriate comments, talking about sex. She starts talking about one subject then gets very animated and loud. She skips from one subject to the next, talkd very fast. We are wondering if this could be a psychiatric issue or getting ready to have a vervous breakdown, or on amphetamines.