Want a baby so bad but so scared!

I've known my current boyfriend for 6yrs, we've been together for a year. Hes been divorced for 7yrs from a 16yr marriage, did have another short lived really bad relationship after that.

He has 3 kids from the previous marriage, and is a wonderful father.

I've always wanted kids and hes been completely supportive of more kids.

Im 30yrs old and he is my first relationship, and I can see my entire future with him. Everything we do is so effortless, from our first vacation, to making dinner together, rearranging the apartment everything. We've never had an arguement, gotten "huffy" at each other but it passes quickly and it's very rare.

I was on BC for 3 yrs but decided I want a baby, I want the baby young enough I can enjoy raising my child, my parents are older so I want them to get to enjoy my child. I stopped my BC, I have been having sex with my BF with no worries, issues, or freakouts. But then I start thinking and get terrified of the thought of raising a child. I've talked to him about it and he thinks it's the thought of change that scares me.

Is this normal?! I've always wanted children and the thought of being pregnant doesnt scare me. I think it's the thought of change?

I'm sorry this is long but I needed to vent and I guess I'm looking for reasurrence that its normal.