Brown discharge and cramps!

Jess

4 days until my period is due, I had unprotected sex yesterday morning and then took an ovulation test to see if I was ovulating which was negative, my discharge was thick egg white. This morning I had mild cramps, more egg white discharge, and now its brown discharge, not all old blood just like egg white with brown streaks. Could this be implanting even though I'm 4 days away from my period? Second ovulation test said negative too.