How common is brown spotting on the day of your period? My period was suppose to come today and hasn't come yet. All I have is light, barely there, Brown spotting. A tiny bit on a pad and some when I wipe. It actually started yesterday. I just had a baby 10 weeks ago and had my first post pregnancy period at 6 weeks. My fiancé and I did have sex once, unprotected, but I'm positive he pulled out way before anything happened. That was on March 21st.