Trouble connecting to second baby

I feel like a TERRIBLE mom. I’m 6 weeks postpartum from my second csection. I also have a 18 month old. I feel like I’m having trouble connecting to my second girl still. I thought by now it’s be better. What is wrong with me. I love her and want to be with her but splitting my time seems impossible. How can I feel more connected. I’m trying. My doc said postpartum scale seemed ok and I’m not depressed…