Am I pregnant or is my period coming?

I was intimate Saturday the 25th of this month witch has been about four days ago and I'm suppose to Start my period the 7th of July. These past days I have experienced white discharge, cramping and nauseas feelings when I usually get these feelings two days before my period but my period is about a week away. Is it normal to experience these symptoms so early on? Should I be worried? Or wait it out to see if my period comes? Thank you