Next period is supposed to start in 5-6 days. Earlier today in the am (after first pee, maybe 2-3 hours later)I took a first response early lined test that was negative. In the evening for some reason I took a first response digital. It read yes +. I started researching chances of false positive. I saw somewhere to open the test to find the lines. I figured since it was positive it would have two lines. Just one is there. Chances of a false positive ??