AF Due 10/20 or 10/25?

Aoc264 • I`m 32 DH 40 this is my #6 time TTC, DH and I been trying since 10/1/2013 after a MC. I have three wonderful children.
I'm so confused. I guess the stress of TTC has messed up AF therefore I do not know when I'm ovulating so with all the ovulation test I go! If I don't get that BFP by the 25th! WHO'S WITH ME# BABY DUST ALL