Anyone else feel or have felt like this?

So I have a 6yo and 2yo and now pregnant with my third and we weren’t trying or anything and my fiancé wanted a 3rd for along time but I told him my concerns etc and wanted to wait until my son was atleast 3 n a half 4yo before we try or even want to even have another at that point. And wen I found out I was pregnant already I’ve been struggling to connect with this new baby. I Dnt feel connected like I did with my son and it’s been worrying me a lot like will I ever feel close to it? Will I always feel like it’s just a new baby? Anyone else ever felt this way? Did it change or did it continue until it’s actually born? I feel like a terrible mother for feeling this way. N I’m worried my PPD from my son is carrying over to now me being pregnant with it n I’m so scared it’s gna make me feel worse wen the kid is born 🤦🏻‍♀️🤦🏻‍♀️😩😭