Hi,
'A mood swing is an extreme or rapid change in mood. They are commonly associated with mood disorders, of
which the classic example is bipolar disorder (also known as manic depression) and also a major factor in
hyperactive or hyperactive/inattentive ADHD.
http://www.sign.ac.uk/about/press/pr30-5-05.html
Other causes of mood swings are due to hormonal changes that can temporarily upset brain chemistry, such as
during PMS, pregnancy, perimenopause, menopause or puberty. As the hormones involved normalize, these mood
swings generally subside on their own.'
http://en.wikipedia.org/wiki/Mood_swing
It would be a good idea to review with your psychiatrist to find out the cause of your symptoms.
Let us know about how you are doing and if you have any other complaints.
Regards.