Should I wait ?

Took two tests one last Friday and one last Sunday both were negative..... my period was supposed to be here Friday the 22nd here it is Sunday night and AF has not dropped in for her visit nor do I feel cramps or back aches like I usually do when she comes to town.... I have been up to 5 days late a few other times and then she shows up. Should I put myself through another test? I was very disappointed and sad with the last two tests