That's amazing -- great job! They often come way earlier than just 1.5 weeks. Good for you (and them)! My firstborn was early too. But the stats show that almost half are early and almost are not, among 1st borns (and a tiny fraction arrives on the due date).
yeah, the doctor told me he was expecting them to arrive earlier, but it was much better that they "waited" to come
I have 2 sisters and they both had their firstborn early, just like my mom, so maybe it's a family thing (also, I have a twin brother, so I kinda suspected they were gonna be two as well