Late period with two positive pregnancy tests

I'm so confused. My cycle is usually like clock work. This time, it was a little over two weeks late. I took two pregnancy tests and both came back positive. I'm so confused and heartbroken. AF showed up on Saturday. I took another test and it still says I'm pregnant.  Has anyone had something like this happen to you? I go into the doc tomorrow for a blood test, but I'm not going to hold my breath. I'm so tired of the disappointments month after month.