Super nervous about the new baby

Hey guys. Okay I have a 14 month old baby boy. I love him soooo much. He is a mommy baby. He sleep with me and my husband too mostly with his bed next to ours. But I'm bringing in a new baby boy in may. I'm scared. Like how will my son take in a new sibling? I'm also nervous about my son feelings left out too like he not getting all of mommy love. I know I will love my kids but how do you balance it? Does it come naturally? Tips please.