Who's nervous about having 2nd kid

First of all, I am so happy to be pregnant and can not wait to meet this little princess and kiss you little cheeks and toes. I also am very very nervous and anxious about having a newborn again. I have a 4 year old son from a prior relationship and so there's a "big" age gap and I feel like I'm starting all over. I love kids and babies and I'm sure I'll all flood back to me but I just don't know how it will change our dynamic, if my bow husband is going to be good rolling with the punches that come with a baby..I'm just venting really but would like to hear other mommies perspective on having a baby after 4+ years or have fears about having a newborn again. Thanks girls :)