What a beautiful bird!My EE's first egg also had some blood which made me worry. But she's been fine since then, & laying a large egg every other day with a beautiful hard shell.
I'm a newbie so I just know about my case but more experienced folks here reassured me when I was concerned about the same thing!
And congrats on her first egg!
Post a pic of the amazing lady & her egg when you get a chance!
Here's mine Kiwa with her first egg
You can see a little bit of the blood on the right cornerView attachment 1154933View attachment 1154935