Selfish feelings for baby #2

Ok. I have a son that just turned one year old. I was astounded and so happy to be a mom throughout the pregnancy. Then when he was 9 months... surprise! I’m pregnant again. I didn’t get the same feelings. My husband was just as shocked as me but he taking it really well because it’s another boy. For me, it’s like “omg. I’m pregnant. This soon?” My son only gets me for a year of his life alone and then he has to share me. I also have feelings of how I’m gonna love this baby. I’m not really happy about this pregnancy. I don’t take pics like I did with him. I didn’t even have a shower. Its like I’m in a funk on my feelings for this baby. It also feel bitter sweet for my son because he is a mama baby to the max. My family telling me that I’m just still in shock and the care of 2 babies so soon and what’s to come. But I feel like it’s more than that. When I go to the park with my son, it’s like “these your last few months and I can’t give you all the attention anymore. I have to split it and you have to share me with your brother. I’m also terrified. Like will I love this baby the same as I do my first born? I’ve read articles where moms love one child more than the other. I don’t want my baby to feel neglected. Or my first born feel neglected. I’m scared. 2 babies. Under 1 yr. Idk what’s going on with me. My son is 1 yr and 2 months and I’m bout to give him a little brother in 2 months. I’m terrified about it and handling them. I’m scared I’m have post partum with this child.. What’s going on with me??