That happens to me alot and I am clincally depressed it could be serious depending on how often these mood swings happen. A chemical imbalance in your body could be causing it or you could have bipolar disorder.
i have bin goin from happy to feeling depressed. it happends with no warning and for no reason. people have told me i should go see a doctor about it. should i go see one and wot could be causing these suden mood swings?
p.s i am not female so its got nothing to do with periods