I've always used FRERs with FMU but some have better luck with SMU when they are early.
Tested this morning and bfn as expected. There is a line you can see in the picture, and I could somewhat see it IRL, but there was no color to it so I think the camera is just picking up the anti-d strip. Still feel very optimistic! Temp looks good today and there is still a whole week for that test to go positive! Will take it day by day based on temps to see when I test again... But will probably be tomorrow lol