Very Irregular! :( trying for 3 years!

Hey! My husband and I have been trying for 3 years to have #1. Each month I think I'm late, or my calendar shows I should be late, I take a pg test. Then, without fail, the very next day my period starts. It doesn't matter how many days after I'm "late" that I take a test either, it's always the same result. Does anyone have any advice or in the same boat??