Accidentally had sex only 6 days after starting birth control 😕

So I was not informed that you shouldn't have sex unprotected until after 7 days on birth control. I'm not too happy that my doctor never mentioned a thing about that, but I probably also should have done my research. 😕 He pulled out and did not finish inside but I still worry. Do you think there's still a high risk at that point for pregnancy or not?Â