Has this happened to anyone?

Rebecca • Wife💍 Harrisons mommy 🥰 TTC baby #2

My period is 3 days late so i decided to take a pregnancy test to ease my mind. When I first took the first response test, the positive line showed up immediately but then the dye left the positive line and went into the control line. So it looked positive for about 10 seconds and then turned negative. What the heck happened? Has anyone experienced this before?