I Had My Last Period On July 14th, I Had

I had my last period on July 14th, I had sex on the 3rd of August, today is the 12th of August. I'm sappose to start my period in two days. the past two days I've been having brown stuff Come out of my vagina.. please help.. also when we had sex we used a condom. There was white stuff on the outside of it but since it wasn't broken I guess what was from me. Please help me..