Hey ladies I’ve got a question !!! Please help a sista out :)

So i’ve been on Nexaplon (the implant) since June so about 6 months . I made sure I didn’t have sex for atleast a month after it was inserted . So me and my bf usually use condoms with my birth control , doubling up. But recently we decided we wanted to try to see how it felt like w/o one he did like 3-6 strokes (sorry to be graphic ) and pulled out , cause I got scared 😂. I know I’m a baby . But I was kinda worried I could get pregnant, I know it’s likely but how likely ? What should I do?