(((goth))) What do you suppose is causing this latest downward spiral? Is it an anniversary of that event, or something traumatic for you? What have you done at other times when you have had such dreaming?
I'm glad you realize that this is a different mood, and that you can remember other times when you were also depressed, and most importantly, that you can recall not being so depressed like you are right now. Try and remember that there have been other times, and you got through them, and you will get through this one too.
Darker times call for stronger light! It's very tough to take care of yourself when you are so low, but keep your mind going to good things... and not on the past, not on the present much either, but on each individual task you do, as you do it (mindfulness.) One foot in front of the other...