Positive then immediate negative

Hayley

SOS. OPINIONS. I took a first response and there was a definite light pink faint line. I went and got a clear blue a little while later and got a negative. I’m 4 days until AF is due, and my first test was at about 6:45 at night, second at 8:15.

Could the second be a false negative? Is it more likely the first is a false positive?? Did I test too soon after the first at night since I’m so early?

Thoughts?!?