Supposed to start today!

I have 3 different apps to track(ya im obsessed) each says a different day AF was supposed to show. The 26th, yesterday & today. I've been testing like a maniac. But all negative. I can usually tell when AF is coming this time around I feel nothing. Friday myself and SO seen a vvvvfl but it went away at about 6 or 7 minutes. I use the easy@home hcg tests. My question is am I out this month or is it the tests should I go buy different ones?