Is this postpartum depression?

My baby is now 6 weeks old. I love him so much, but I don't know. I always feel tired, like I can never get enough sleep. I feel like I have no motivation to do anything! I feel low a lot and I can't shake the overwhelming feeling off just disgust with my physical self. I've even stopped eating really.  Sometimes I feel like I just want to run away. The other day I scared myself thinking I wanted to take my anger and frustrations out on myself. I tried to speak to my so but he mostly takes it out on himself. That he's failed. I understand how it frustrates him but it just makes me feel like I can't go to him. But I just feel like there's no help for me because anyone I have gone to has said its impossible that I have ppd because then I wouldn't love my baby. That I'd ignore him and not bond with him. But I've been the complete opposite. It feels like the most I can do is be with him. I don't trust anyone with him and I'm in constant fear of something terrible happening to him. I'm not sure if I should go for help or not.