help! pregnant or not?

Kaitlyn
We are on month 4 TTC. 2 days before my expected period I took a HPT and got a negative. When my period was due, I didn't see anything. So I went on a run and that kind of woke things up but it was a very light and brown discharge. That has continued for the last 4 days. The light and brown discharge. Should I take another test or is it just a happen stance?!