You might have premenstrual dysphoric disorder if, at the start of your period, you experience major depression along with these symptoms:
- Mood swings
- Irritability
- Anxiety
- Trouble concentrating
- Fatigue
- Change in appetite or sleep habits
- Feelings of being overwhelmed
It is a severe form of PMS. The mood swings can be extremely disruptive to your lifestyle, work and relationships.