how long to wait before having unprotected sex after starting the pill?

Mandy
Hey, ladies! 
So, I'm 18. I just started birth control October 5 (I procrastinated having my first "lady doctor" appointment) 
& I was just wondering how long you should wait before having unprotected sex after starting the pill? 
I see a lot of people say a week, but just asking for a little extra advice! 
Thanks!! ☺️