I would wait until until Tuesday and then get the first response pregnancy test. They are a little pricier than the other brands, but they are the only ones I will buy because it will give you an accurate result up to 5 days before your missed period. If you get a BFN, then I would wait until you miss your period and check again. With some women, it takes longer for the HCG to show up on a test than others. Good luck to you!