I think it would be reasonable to try and request your date is a little earlier based on when your first was born, but like you say, this little one might happily reach your current planned date anyway!
I never ever in a million years thought I’d be sat here saying I have my pre op today. I never thought I’d even reach remotely close to my planned date, in my head booking it in was just a formality for the medical professionals… but the reality is, unless these babies arrive this weekend, it’s looking more and more likely I’m reaching that planned date!
initially when it was booked in, that date meant absolutely nothing to me as I didn’t anticipate reaching it. Now it’s all I can focus on. The unknown and anticipation is really difficult, I really do sympathise