It sounds like she has PMDD, which is an EXTREMELY severe form of PMS, which is sometimes treated with antidepressants
my live-in girlfriend of over 2 years now has PMDD and it is the most challenging part of our relationship - she put a hole in the wall the last time she raged out. Fortunately I am a pretty big guy and I am able to restrain her without getting too many scratches and bruises, she is really fucking strong for her size since we lift weights together - a consistent exercise regimen seems to help with managing the hormone cycles and reducing severity of symptoms. She is just out of control and angry and depressed when she is experiencing acute symptoms, but then once she gets to grips with reality she's right back to being a sweetheart and she acknowledges and accepts that the only reason she was acting that way was because of hormones. I find that leaving her alone when she's actively raging is actually a bad idea, as it allows her to stew with her own thoughts, which essentially, are completely poisonous at that time. It's like some sort of murder-suicide urge and you don't want that plotting your destruction in the other room

Also, women have an increased need for emotional and physical closeness when they are experiencing these symptoms, so even though they are raging, they really just want a hug and someone to pet them nicely till they can calm down. When she put that hole in the wall not too long ago it was because I was unable to be there for her and give her the help she needed.
Fortunately, my girlfriend had received a diagnosis of PMDD from a psychiatric professional already as a teenager, so when I told her about what I thought was going on she was fairly accepting of my confirming diagnosis after we went over the symptoms and literature, and things have considerably improved since then. Sometimes the PMDD symptoms make her really horny though so it's not all bad.
around 1 in 15 women have PMDD
http://en.wikipedia.org/wiki/Premenstru ... c_disorder
Quote:
Premenstrual dysphoric disorder (PMDD) is a severe form of premenstrual syndrome (PMS). Like PMS, premenstrual dysphoric disorder follows a predictable, cyclic pattern. Symptoms begin in the late luteal phase of the menstrual cycle (after ovulation) and end shortly after menstruation begins.[6]
Emotional symptoms are generally present, and in PMDD, mood symptoms are dominant.[6] Substantial disruption to personal relationships is typical for women with PMDD.[6] Anxiety, anger, and depression may also occur. The main symptoms, which can be disabling, include[7]
feelings of deep sadness or despair
feelings of intense tension or anxiety
increased intense sensitivity to rejection or criticism
panic attacks
rapid and severe mood swings, bouts of uncontrollable crying
lasting irritability or anger, increased interpersonal conflicts; typically sufferers are unaware of the impact they have on those close to them
apathy or disinterest in daily activities and relationships
difficulty concentrating
chronic fatigue
food cravings or binge eating
insomnia or hypersomnia; sleeping more than usual, or (in a smaller group of sufferers) being unable to sleep
feeling overwhelmed or feelings of being out of control
increase or decrease in sex drive
increased need for emotional closeness
Common physical symptoms include:
breast tenderness or swelling, heart palpitations, headaches, joint or muscle pain, swollen face and nose
an altered view of one's body - a sensation of 'bloating', feeling fat or actual weight gain.
severe headache
Five or more of these symptoms may indicate PMDD.
the severity of the symptoms is really what characterizes PMDD. I know when it is time to be very vigilant about her moods due to how swollen her breasts are and her bodyweight, which she usually checks once or twice a day (excessive water retention is a big sign for that the hormones are cycling around) - many of the other symptoms will be present although they sometimes vary.
Women are subject to a whole host of hormonally induced states of being that men can't directly understand. PMDD doesn't just affect their relationships with men, it affects every aspect of their lives. It poisons every thought they are having, and twists their perceptions. Sometimes bitches don't choose to be crazy, so to speak. That being said, a woman with PMDD can be very challenging and she better be special enough to be worth the extra work. She also has to be willing to accept reality and work on improving her cognition and behavior surrounding her acute symptoms.