Anyone had this happen to them?

Has anyone been a few days late for their period and gotten a negative pregnancy test when they tested in the middle of the day but got a positive when they tested with the first pee of the day? I'm 4 days late and today I had the tiniest pink tinge to my discharge when I wiped for an hour or so and now it's gone. I have very regular periods and I normally have violent cramps that start as soon as my period does/immediately before. Spotting is not normal for me. I took a test in the middle of the day today (I drink a lot of fluids) and it was negative. Looking for some similar experiences. I might retest tomorrow or the day after if my period still hasn't come.