Paranoid af

So I slept with a guy a few days ago and before people start telling me to learn about sex, I’m 19 and honestly I’m just a paranoid person because I’ve had so many pregnancy scares. So I’m on the birth control shot and I have been for almost a month. We used a condom and he says he didn’t ejaculate but honestly I don’t know. Like I don’t think he’s lying but even if he DID ejaculate, there is absolutely NO chance of pregnancy, right?