Because me and my boyfriend try to have a baby since three years and nothing working
Yes, possible but I'm not sure what your question is. You can have sex once and get pregnant or you have sex and you are pregnant the next day?
Anytme you have unprotected sex you always have the risk of getting pregnant even if he didn't "***" in you the precum Can still get you pregnant
Anytime you have unprotected sex you can get pregnant whether it be 1 or 20 times... It's always possible when it's unprotected