Me and my boyfriend had unprotected sex a week and a half ago, and it was my first time. It only lasted a few minutes before we stopped because I thought it was a bad idea considering we didn't have a condom. He didn't cum or anything so I thought everything was okay. My period wasn't supposed to be until a week later, but instead I started a few days early. It was like a normal period at first but then it just randomly stopped instead of gradually getting lighter. It stopped for a day and there was no blood at all, then when I got up to pee this morning there was some dark reddish brown blood? I don't have any symptoms besides fatigue, but its because I haven't been getting much sleep lately. My breasts aren't tender and I'm not experiencing morning sickness or frequent urination. I'm just wondering if there's any possibility I could be pregnant, or if I could just be overreacting and worrying too much. My mom said that my body could be changing because I recently returned from vacation and I've been fairly stressed lately. But I'm still so worried, if anyone could help or give me some feedback I would greatly appreciate it!!