Post natal depression

My baby is 10 days old and I feel like I have no other way but to express this then doing it on here and anonymously.. I love my baby so much! But I don't feel like I should I don't feel that unbalivable loving feeling, I don't feel like everyone said I would. And he's 10 days old and starting not to sleep or it's taking over 4 hours to get him to sleep or nap.. my boyfriend goes back to work on Tuesday and I'm so so scared to be on my own with him because I feel like I can't cope with this I feel like a terrible person for not loving my baby as much as I should and I don't know if it's because of my hormones that I feel like this but I don't feel like I can talk to anyone. I feel if I even dared mention this to my boyfriend he'd be mortified of what comes out my mouth but I'm really struggling. When im feeding him if he's sick I get angry, if he poo's as soon as I change him it annoys me! I feel like I should think all these things are cute and I'm still suppose to be in a bubble of love and joy but I'm not! I really don't know what to do, I know I sound awful I hate myself for feeling like this cus he's just a baby and he doesn't know anything! Please no hate I just need some advice or support