Advice and guidance please :)

Ho

Hey everyone! So I use this app and Ovia. Glow predicted my fertile window correctly and predicted AF to be due on the 11th which hasn’t happened. Ovia predicts the 15th for AF. Not sure which to trust. Also, I had a few faint positives a week ago (8-10DPO) followed by a negative around 12DPO 😩 I want to test again but I’m not sure when I should. Any advice ladies? <3