Colds and ovulation

I normally ovulate CD 12 or 13 but I have a cold stuffy nose & sore throat and I normally get ewcm CD 11 today is CD 12 and I haven't seen any ewcm but I have also been taking vitamin c for my cold 500mg daily up until CD 10 can that affect ovulation? Did anyone's ovulation delay because of a cold if so when did you ovulate?