Hello, I'm Sue, I had unprotected sex with my boyfriend in the last of my period (there was a little brown spot on my liners) He didn't ejaculated inside (he pulled out) and the next morning, I found out there was blood on my underwear not a little spot but it stopped. I had sex on Friday night and Saturday morning, so today is Thursday, if I want to prevent a pregnancy, is it too late ? I'm so scared and worried about it, bcs I'm senior student on my last semester. Please answer my question and help me. . Thank you so much.