Should I take a test?

I've been tracking my periods for a few months now and I seem pretty regular, but I've been hoping to be pregnant for a couple months and every month i over estimate my Pms symptoms for pregnancy symptoms. Well this month things really do seem different. I was supposed to get my period on this past Sunday or Monday, but it hasn't come yet and I've been having very different sharp cramps and constant breast tenderness. Should I take a test now or should I wait? Am I being too anxious?