Advice needed

I have 5 period tracker apps and for some reason this month none of them are on alignment for my next scheduled flow, which means I don’t really know when I should test. I ovulated around the 8th or 9th using opk strips. & I’ve been getting faints since yesterday. But I’d still like to rule out aunt flow with a blazing positive. When should I test exactly? My last cycle was the 21st & I just said I’d wait until Tuesday to test does that make sense