I am 17 years old I highly believe I suffer from depression. I am constantly sad and at times I can't even go out in public because I begin to cry and cannot stop it. Before my monthly cycle I begin to get excessively sad, I have nightmares and wake up very afraid. Yesterday and today I have had moments where I feel really sad and begin to cry but I am over 10 days away from my monthly cycle so i dont even know if that is exactly the cost. I have been this way for probaly 2-3 years now and I am tried of feeling so unhappy. Can someone please explain what is going on.