Feeling like s horrible mom..

I feel so alone and a horrible mom. My son has been crying must of today and barely sleeping. He is 6 weeks old. But wanting to sleep just not staying asleep. I feel he has been wanting to nurse all day but my nipples are cracked so he starts them bleeding. I feel so depressed I can't feed him and get him to stop crying. I just couldn't take it anymore. I put him in his crib and slammed the door crying with him I didn't even leave him in there for a min, I ran back in baling my eyes out. Now here I am nursing him and he is quit and I'm hurting. Idk what to do I feel so alone right now.. Having thoughts that I don't want to even be having...