First time trying

I need some help!

My usual period app (Clue) has been pretty spot on for my expected periods. Which is telling me I ovulated 8/8 and that I'm not due for AF until 8/22. But, since I started using Glow and tracking OPKs, it tells me my AF is due today and that I ovulated on 8/2 after I had a + LH surge on 8/1 and 8/2 (Sorry if it's confusing). So my question is, what prediction do I go by? Clue is almost always spot on for my expected periods but Glow is telling me otherwise. I had a BFN today too, but have been spotting (which I normally don't spot before my periods).

Any input helps! Thanks 😊