Get outside - it will help, especially where you are - sunshine!
Do you do any kind of exercise? I have found walking outside to be incredibly helpful. This morning I was so angry at the pain my children will experience when we tell them H is moving out and being able to walk with/through that feeling was good.
I have been feeling pretty good, because our R has been getting so much better, but since he's confirmed that he is still moving out, I've been down a lot. It is easier when with other people, because we have to put on that happy face, and I also am able to be happy when interacting with my H, because I'm happy to be with him.
For me, one of the signs of depression is cycling thoughts - not being able to stop thinking about things that cause pain. I'm finding it much easier to stop that since taking antidepressants, although in the past couple of days it's been more of a struggle again. I'm hoping this settles down once we're past the hurdle of letting the kids know what's going on.