second baby feelings..

My second baby is 4 months old. Many times she will be crying and I will feel so annoyed. I constantly feel like she's annoying and needy (yes I know she's a baby). I'm just getting my feelings out. I feel like she takes away time from me and my son. God writing this makes me sound terrible which is why I haven't brought it up with my doctor. I love her I really do. She's a good baby. But I feel so much more connected to my son for some reason.. what do I do? I'm scared to tell my doctor I have these feelings. Maybe I just need more time to bond?