Answer and explanation:
By reading these lines above, considering the scenario described and they behaviour of the patients, I can deduce that what she decided to do was something purely out of impulse. She acted on impulse after a massive feeling of joy that overcame her after having two bad emotionally weeks. Also, she acts nicely in a moment and then agressively changes her behaviours from one second to another. I would guess that the pacient has bipolar disorder.