false negatives

Has anyone gotten a false negative

? So A/F was due on the 9th. I am finally having a normal cycle and I tracked everything last month. on the 8th my boobs became really sore, and they still are. My lower abdomen is becoming hard. But I still keep getting negitive. And no symptoms that A/F is coming. I have been super nauseous and gotten sick a couple times but still getting negatives.