Making a Mistake on My First Day

Moving to this new city was exciting but terrifying. I started a new job last week and messed up big time on my first day. I accidentally sent an email meant only for my boss’s eyes to the entire company, including some sensitive financial details. I felt sick when I realized it. My coworkers were kind about it, but I still can't shake the feeling of embarrassment. I keep replaying that mistake in my head.