Feeling so upset

I feel so guilty for even feeling this way but I just can’t help it. I had my second baby 2 weeks ago and ever since, I feel like I can’t adjust to the change. I’m finding it so hard with her being here. I feel guilty and currently sat in tears as I miss my first born. I feel like I don’t have the same time for him at all and it’s killing me because I spent every second with him before she arrived. I love my daughter but I sometimes just wish things were back to the way they were so I could spend proper time with my son. Am I an awful mother for feeling this way? 😓