Depression?

I have left a few comments about this but thought I'd make it its own topic. I had a very stressful life before my miscarriage and I feel like this process (unplanned pregnancy and a drawn out miscarriage that will likely end in a D&C next week) has tipped me into a depression. I don't want to get out of bed, I feel hopeless, I'm eating very unhealthy and just find myself either not caring or being annoyed by everything. I don't want to feel like this but I don't know what to do. Has anyone had a similar experience? What helped you?