Is it normal to be worried?

Lynne

So I found out I’m pregnant again last Wednesday. I’m happy about it but I am kinda worried cuz it’s been 4 years since my son was born and I had him before my now husband. My sons father is completely different than my husband so i know in my head it’ll be a different pregnancy experience. So honestly I don’t know why I’m worried but I am, can anyone explain this to me lol