Has anyone experienced darker positives later in the day versus fmu? I've been testing for three days and my fmu has been light but my tests have been getting darker with my evening pee between 4-6pm..Wednesday morning faint positive Wednesday around 630 darker..Thursday morning faint positive Thursday evening 630 darker and darker then Wednesday evening..this morning faint again..waiting to test this evening..just curious if this has happened to anyone?period was due yesterday..