Little lost

I have been with my current bf for almost a year and we are almost 400 miles apart.  I went down during obvulation time to see him and was almost positive that it took but now I have started my period almost a week early but it's very light compared to normal not sure if that's a good sign or not when I was pregnant with my daughter it took some time for the pregnancy to show up is it still possible to have conceived this time or should I just continue on trying later