New baby

I am 17 days pp with my second child, a girl. My first is a boy, 13 months. Yes, they are close together. It's been very hard for me, I have ppd pretty bad from my first and being pregnant and dealing with that was hard. I have some family close by to help me with adjusting to having 2 under 2... I don't feel any connection with the new baby, at all. I miss my son and being able to give him all my time, although he is being a good big brother and not acting jealous. I still feel bad for him and I just want to spend one on one time with him, but I can't because of the new baby. I'm really struggling mentally and emotionally with this whole change. I care for the new baby, but she doesn't feel like mine, it feels more like I am watching a newborn for a friend who is coming back in a week or so..... she doesn't feel like she belongs to me.