it highly unlikely but article i read said that if you have a very long or a very short cycle it would mean your ovulating close to when you would start bleeding so if you really think your pregnant i would call your doctor and see how long you need to wait to take a home test or get a blood test done
Im worried my period usually comes 7 days its my 3rd day Nd im basicLly getting nothing
not likely if your on your period your not ovulating and your new ovulation cycle starts two weeks after the start of your period so even if you had unprotected sex that day its very unlikely that your pregnant wait and see if you start if you don't take a pregnancy test