Got a negative Pregnancy this morning 5/6/15 AND Ovia stated 6 days to take a pregnancy test.

Im using this app called Ovia and it's a good app and I like it. I log in all of my information and I got all of my information back in my email stating that I have six days left to take a pregnancy tests. That would be over two weeks or just two weeks. So this morning (5-6-15) I took a pregnancy test and got a negative results. I thought okay let me see it will show up but boy I was wrong. So I can't wait til 6 days to come and plus I have a doctor appointment on Friday (5-15-15). I'll ask for a blood draw just in case.