Help help help, and ideas?

Ari

From first spotting to last spotting, my period lasted 6 days. 3 days ago, my period ended. 2 days ago, BD. Last night, nada. Now tonight I'm seeing sticky brown discharge. Not much, but it's accompanied by slight cramps on the left side. This can't be implantation bleeding. Not enough time has gone by. I have experienced spotting during ovulation, but never 3 days after my period ends. Any ideas?