Bleeding on my second time??

In my first time with my boyfriend I didn’t bleed, but on the second time I felt like I really had to go to the bathroom after and when I went to the bathroom there was a lot of blood in the toilet when I went pee, and it was really hard to pee. I thought it was just my period but it stopped that night so was it my period? We probably could’ve been more careful the first time but it was right before my period so I don’t think I could be pregnant but it’s been almost a week and my period still isn’t here so I’m freaking out