Am I Pregnant?

I had my period on May 6 and it ended on May 10, my most fertile day was the 22, I had unprotected sex that day and on May 28 I noticed dark brown stuff every time i wiped it lasted for a few days accompanied by nausea and dizziness and headaches. On June 2 I had an egg yolky discharge with the same brown color. Today June 5 I got my period it started off a light pink and now it is a true red, could this be a false menstruation? My period was also 6 days late