Me and my boyfriend just had sex for the first time tonight. I’m 15 almost 16 and he just turned 17. And it wasn’t for very long. But afterward he said to check to see if there was something left inside. I didn’t feel anything, and immediately after I had to pee. He said he was pretty sure he didn’t cum. My period also just ended yesterday. Could I get pregnant?? I’m really paranoid about this. And nothing came out when I stood up?