Post partum and grieving.

Has anyone on here lost someone close to them relatively soon after having a baby? What did you do to keep yourself from getting depressed? I'm 2 months post partum and am grieving a loss. I'm trying not to let myself spiral and become depressed by making it out at least once a day (huge accomplishment for me) and continuously telling myself the my LO deserves a happy mommy and that the one I lost wouldn't want me to be sad. It seems like no matter what I do I'm just not able to pull myself out of this and am possibly even getting worse. Any tips from experience would be wonderful. 
Thanks in advance.