Wanting to get pregnant 😭

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I have been on birth control since I was 14 and I got off when I was 17. I have used unprotected sex with my ex boyfriend of 3years and never got pregnant. I am now 21 years old and my boyfriend now and I are trying to get pregnant and we only tried one month and had no luck. Hopefully it will happen soon! Does being on birth control affect getting pregnant?! I need answers.