I had intercourse with my significant other on November 3rd (I was ovulating/highly fertile that day). Started spotting on November 10th and it turned into a very light/unusual period. TMI-- Lots of brown blood and pink/clear fluid, but also bright red blood. Lasted 3-4 days, with no normal period cramps or symptoms. Now my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> is telling me my period for December is 4, going on 5, days late. Is there any chance I could be pregnant? Could November 10th's bleeding just have been caused by a period or implantation bleeding? I've had a child before, and the implantation bleeding was very similar, but I took 2 pregnancy tests on November 12th--of which were both negative.