Which one should I go off on?

Mrs. • Finally have our babies. R.I.P Kimara Jeffers. Welcome 2 handsome boys Allan and Kayden Jeffers. 👧🏾👼🏾👶🏾👶🏾👦🏾
I don't know what to go off on. 3 apps says my period should be on:
Ovia says 7/22
other app says 7/26
Glow says 8/1 
I'm to scared to take a pregnancy test if im 2 days late if my AF suppost to start on 7/26. 
I don't know wen I ovulated. Because I didn't test the ovulation test to see if I did ovulated. I test here and there. But I BD every other day til last night. My temp is all mess up. Smh. Last time I got my period was on June 22. I'm 34 cycle day.