To Test or Not To Test

Today is the expected start day of my period and so far nothing. I generally have some spotting the first day by this time. I took a test 4 days before expected AF and again 2 days before and both came back as a BFN. Today I have light cramping. I have been nauseous off and on for a few days and some breast tenderness. Should I test again or am I just being too anxious?