LATE PERIOD AND ALL NEGATIVES WTF

Okay my cycle is super regular, every 25 days, and AF is two days late... I know that’s not much but it’s soo unusual for me. Of course I’ve been testing since the first day I possibly could and they have all showed up negatives. Could I just not be producing HCG as fast as others? My husband says to wait til Saturday and test again, I’m just wondering if it’s possible I could be even tho I’m getting negatives?!