Will I ever feel the same about my first born

I have 2 girls, one is 4 and the other is 14 weeks. I was so worried before I had my second that I wouldn’t have the bond and unconditional love I have for my oldest girl but when my second was born there was no doubt about it, I love her so much and want to be around her at all times but recently I have lost that bond with my eldest, I don’t have the time to spend with her or the patience and I feel so guilty, I used to do everything for her and now I can’t, I feel worse and worse every time she asks for her dad instead of me but when she does ask for me I’m usually busy with the baby. It’s breaking my heart and it doesn’t help that she is playing up at the minute and all I feel I am doing is telling her off. Is anyone else in this situation???