Need help!!

Sunday I took five tests. They were all blue ink tests but every. Single. One. Had a vvvfl. Even my boyfriend who does not have line eyes saw them. I’ve taken four more FRER tests over the last four days, nothing. On any of them. Today is the day my period is supposed to start (nothing yet). My periods can be a little irregular so it may or may not start today. But can anyone give advice on how I got FIVE vvfl but now nothing? I guess a possible chemical? It’s hard to believe five tests could have given false positives. I’m just so confused.