14 days late negative pregnancy test

Taylour • Mom, wife, blessed life
Im 14 days late and felt like I had a uti at 5 days late but that only lasted half a day. I had really light pink blood when I went to wipe only once on 6 days late. Yet negative pregnancy test today. What's the chance I am? Has this happened to anyone else? I go to doctors tomorrow, but would like to know some of your opinions and experiences. 

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