Testing 3 days before period??

Me

I’ve had horrible cramping and sore breast for 5 day’s. Never have I ever had this a week before my period. This would be my third pregnancy so thought I knew I was for sure. Just took a Walmart brand pregnancy test and it was negative. Total bummer. Was it too early? I didn’t use my morning pee either, so wondering if there still is hope?!?? Anyone else have a negative and then a positive in this situation?