feelings without stories

I don't know why I am like this. One day, I am fine, feeling good, working hard, getting things accomplished. The next day I feel sad, alone, defeated. My situation doesn't change, so why does the way I feel? Is this just loneliness, or real depression? Is it just a sense of hopelessness and frustration that will pass in time? I worry that even after my situation changes and I am finally where I think I am that I will still feel this way.
Anxiety, definately. Dread, for sure. Anger, lately. Betrayal, lately. Loneliness, mostly.
Happiness, sometimes. Excitement, before. Friendly, often. Love, most definately.
These are the emotions devoid of the stories. Does it help? I am not sure. Writing does, talking does. Thinking that maybe someone reading this, "gets it" does.