This may sound like a stupid question, but what are you telling yourself?
Are the majority of your thoughts along the lines of "things will never get any better, I'm always going to feel this bad, nothing good ever happens.."?
Not to oversimplify, but our belief creates our reality. It's easier for some of us to support and encourage others, yet so difficult to support and encourage ourselves. I have had some horrible losses in my life, one that rocked me so hard I didn't know if I would make it, but I'm still here and life is good. I give myself credit for what I have lived through and when things get rough, I try to remember to treat myself with love and compassion.
Silly to some maybe, but it has worked for me.