Can I actually get an answer?

Really haven't gotten an answer to what this might be. Last period was June 26-30, had unprotected sex with SO on July 9th. He did finish in me. Today is July 13th and I got this this morning. It lasted for about 4 hours. And wasn't found in my underwear, I had to wipe to see it. I thought it was too early for implantation since my period doesn't come on until next weekend. Anyone know what this might be?