I had sex a few days after my period and I made sure it was over. I lied to my boyfriend bout it so that I had time to make sure it was clean. 3 weeks later I had my period. My periods are usually irregular so I figured it's okay. But I'm still so so worried. Please help! Could I be pregnant? I haven't been feeling anything at all and I've only done it once, just that night. No sperm came out either.