Hey guys.. how's everyone doing? Quick question for you all.. how important is fmu when testing early? 4 days until my period is due and I did a test this morning first thing and I got a faint bfp.. then I test about an hour later and my urine was very clear, and the test was bfn with a slight shadow. (I mean I had to hold it in several lights to see)

Did a clearblue plus last night and got a plus before the 10 minute window ended..but a NEGATIVE on the clear blue digital. What is going on!?