Need Answers

​I'm eighteen, and I just recently took myself of the birth control pill because my boyfriend and I want to conceive in near future. Mind you we wanted it in future and not immediately. So we were using condoms as a contraceptive, but a condom broke the day before I was supposed to start ovulating. I'm not showing any signs, it's only been a few days. Everywhere I've read says to wait twenty one days before a test. Is it even possible to be pregnant this soon after taking myself off birth control? Advice from anyone!!