hi this question is for my sister a mother of 2 who is 39 yrs old. need an expert advice on this . my sister who has always been a very cool n calm person has suddenly changed . by tht I mean it all started last year in march she would fight with anyone n everyone .this went on for 3 months n then it stopped. again this year from march she is been getting this angry attacks I don't know wht to call it . it's like she will pick up a fight with everyone her kids n husband r mostly of the receiving end. there r times wen she is absolutely normal n fine . but wen she goes into the zone then there is no stopping her. I am very worried because she is a very nice person and I know it's not like her. is she going to premenopause ?. because I have noticed that when she periods are approaching she becomes like this . also from 1 year her periods r irrugrual . where should I take her to a gync or therapist ? please help.