Dr honore my last period was on oct 20th so when were my most fertile days?

Ovulation: If you started on oct. 20 and you have 31-34 day cycles - correct? - the best guess is ovulation/fertile days are between about nov. 5-10. In other words, you may be still in the window. This is a guess based on ovulation 14 days before the expected period. You could narrow this down (next cycle) with an OPK or monitoring with a fertility doctor.