Trying to Stay Positive

AF is due next Monday (3/6) so I took the 6 day early First Response test. It was negative. I know it's only 76% effective and everyone is different but I am already discouraged. I got pregnant with my first two right away and it's not been as easy this time. I'm trying to stay positive and tell myself that it's still possible this month and if I'm not, we can keep trying but it's hard today. Anyone have any tips that help them stay positive?