Well Im pretty familar with the way the menstral cycle works which is why this is semi confusing. Approx 2weeks or more ago was the first day of my last period and I had sex a little over a week ago then yesterday had light spotting. I normally NEVER have bleeding between periods which is why this seemed strange to me. I have a short cycle and I kno that may affect some things. I was wondering if the light spotting I had could be implantation bleeding and could I be pregnant.