Opk ..... I feel it guess glow is off

I feel like I'm about to ovulate or that I am so went and got a test. Took it and it barely even showed. I mean took at least 2 mins and then it's so light almost like an indent only it has very faint color. Glow says this is my week but I usually start af a week after glow says I start. So if that's so I won't have af at all this month. Going to wait and take another test next week see if it changes. Ugghhh