Help me please, personality is strange?

Well i have been ok for the last few days, and suddenly my perants started having a go at me for not getting a job, even though i have applied for lots, and the recession has killed alot of the jobs off, and it got to a point wheir something inside me clicked, its like not me, its like a jekyll and hyde thing. i got angry, swore alot, and even made my mother cry, after that i went emotionless and stared into nothing. now im back to the old me. what is this?