How do I help myself?

I feel like I’m a horrible person and mom. I had my daughter a month ago and I’ve been trying to help myself with therapy and antidepressants. But I feel like I’m constantly suffocating. I’m with her day in and day out. My husband helps for 3-4 hours a day bc of his work schedule. I’ve told him I want to go to the hospital and stay in ward for a few days to maybe help myself. I threatened him today to leave my daughter with him and move back home (4 hours a way) but I’d never do it. I have no help from anyone. I feel like a horrible mom because I get irritated when I can’t help her when she’s crying after I’ve done everything to make her happy. I’ve been so exhausted that today I woke up and accident fed her water instead of formula not to much but enough to feel like a failure. I don’t want to talk to my therapist about this feeling because she’s a social worker and I’m so so so scared of them taking her. I’m at my breaking point. I constantly cry. I constantly have a mental break down. I constantly feel hopeless. I don’t know what to do mentally or physically even emotionally. How do I get through this.