I'm really confused right now. Ovia said my fertile week is the 17th of August to the 22nd of August based of my cm…

I'm really confused right now. Ovia said my fertile week is the 17th of August to the 22nd of August based of my cm report, And I have a average cycle length of 31 days. then when I looked on this ovulation calculator it's telling me my fertile week is between August 23rd and today, the 28th. I don't know which one to believe and it's really upsetting me. like what if I missed my fertile window because Ovia is wrong. I'm scared now.... am I gonna have to wait another cycle to try again 😖😭😭😭😭😭😶