When I was severely depressed, it always helped me to go for a quick run or walk. Working out helps to get you out of the house and makes you focus on the outside world instead of your problems. I am not condoning avoiding your problems in any way, but a brief reprieve is always helpful. I know it sounds weird, but you will feel more energy during the day, and it may help to reduce your caffeine intake as well. I hope you feel better soon. Keep posting.