3 miles but not quite 5k

I've just been out for a very soggy run in the rain and pushed myself to keep going at the end to get to the magic 3 mile mark which I did in just under 38 minutes. I was so ecstatic, thinking I had cracked 5k but I've just checked and I only did 4.9k

Oh never mind! I still did THREE WHOLE MILES!!!! Woo hoo! I would have never believed it possible!

..................but does that mean I've got to run even further next time???