When do stop taking pregnancy tests?

Sarah
I am 4 weeks tomorrow and also due for my period. I've taken a pregnancy test every day since Wednesday all coming up positive and I am definitely symptomatic! My question to you ladies is... when do you stop taking pregnancy tests?! I have 2 left so I plan on taking one tomorrow and one Monday just to be sure. My first doctor apt is October 27. Eek these are expensive but the tests reassure me! Am I alone?!