So confused

So I have two different apps that I use glow and ovia now ovia said my fertile window was April 6-11 which I bd 3 days out of the window then glow said my window was the 10-16 and the only day I bd was the 15 which was my 33% chance of pregnancy. So I don't know which to go by. With my other app I would be around 13 dpo and with glow id only be 8dpo and I've taken numerous hpt and were all bfn n idk when I really did ovulate so I don't know if I should wait until Friday to test or if that would be to soon to test if I ovulated on the 15th any advice guys.