Hi Alykins, I really wouldn't worry, it sounds like you had sex right before your period came on right? Well you ovulate around 14 days before your period starts, and that is the only time you can get pregnant (in a 5-7 day window at this time). So unless I misunderstood and it was longer than a few days before, then you would not have been fertile at this time.
Hope that helps. :-)