Confusion😶😶😶

So the very first test i diluted to much, drank to much water. So i rested the next morning and it got darker. However it just keeps getting lighter and my Apps say I'm ovulating in 2 days.. buuuuut it doesn't seem to be true. Just got off nexplanon Sept4th. Period Sept 12.. I dont know my cycle lengths due to BC it was random.

I only have 1 more opk left, when should s i test? Do you think my apps correct, been using one for ever 6 months even before bc removal..

Ps. The dud one i put to much urine on(tmi) like the screen starting forming literally immediately and the lines didn't form four 40 mins... here's my opk from today around 1 4 hour hold.