Why do i feel like this, for NO REASON? PLEASE HELP ME.

Im a 17 yr old female and i cannot control my moods what so ever. I feel like crying sometimes [over nothing.] One minute im laughing, and the next minute i feel sad and dizzy. My moods keep changing constantly and i feel like im drowning. Why?

[marcruml]

Sounds like your suffering from depression.  Exercise and diet can help a bunch, Yoga, Zen, Tai Chi, all will help quite a bit.  The stress of being 17 can easily cause depression.   I know, it sucks big.  Feels hopeless and nothing seems to matter.  Anyway, stay away from antidepressants.  If you manage your stress with exercise and diet, the depression will go away, if you manage it with antidepressants, it will go and come back depending on your ability to maintain the proper dose which will change as your body becomes used to the drug/drugs.
     Painting, weaving, knitting, putting puzzles together all relieve stress,