BFP 3 days before AF due- no symptoms

Hi ladies, just looking for some insight. AF for me was due today the 14th, but I tested on the 11th and received a bfp!!!! (Very excited) I'm just surprised at how dark the line was, as I see on here a lot of faint lines even when they tested after they were late. Does this mean its possible that I'm more pregnant than I think? Also, I have no symptoms besides some mild cramping here and there. Thoughts?