Afternoon testing?

Hey everyone! So I’ve seen a lot of people on here swear by testing with fmu but then I’ve also seen a lot of people say that it’s better to test later in the day. Thoughts? I took a test this morning with fmu but I was awake a lot earlier than usual so idk if that has anything to do with it but I didn’t have a bfp. It looks like there could be something there but I’m not confident enough. Idk when to test again. Af is 3 days late and my periods are usually 3 to 4 days long