6 days postpartum & feeling depressed

Hi ladies, I'm 6 days postpartum and I'm feeling really depressed. I have been previously depressed about a year ago.  I should be happy, estatic that I finally have my baby girl but I'm not I'm crying at least 2 times a day and I'm just sitting in my room with the lights out. My SO works all day and doesn't get home till 9pm, I feel alone. And at night he's ready for bed, doesn't want to help. I feel as if I'm all alone in this. I have had bad thoughts, of hurting myself. I don't want to feel this way. I want to be happy. Does any other mom feel this way? Any advice on to how to be happier? Thanks!