Am I prego?

Okay so my bf and I went at it like rabbits on vacay last weekend. I accidentally skipped a day of my birth control and according to eve I was fertile during the weekend. I quit the pill just in case and now I am experiencing brownish discharge a week before my period should be starting along with mild cramps. No other symptoms. The discharge looks just like early period spotting. Help me out ladies, what are my chances here??