Yes tho generally if af is late and your not pregnant then you had a later ov not that your ov is "late" but just later than pervious months and it's totally normal. That's why I am waiting till I'm a week late to test again cause I could have just ov later than I had thought. Definitely possible for us all and it would explain late af and bfns. So late af is one of three things:
1. Pregnancy
2. Later ov than thought
3. No ovulation this cycle- generally comfirmed if 2 weeks + late and no bfp ( again normal for women just really shitty!)
It really doesn't matter when you ov in your cycle that's not important, but af should ALWAYS come 12-14 days after ov. That is critical! The most important part of your cycle in terms of sustaining a pregnancy. If af comes before day 12 then you have a short lp and body is not giving egg enough time to implant before it tells af to start.
So what I did to help settle my brain is everyday my af is late I'm going back 14 days and seeing what day that was on the calendar because it's possible you could have ov that day- explaining the " late" af. Anyways I log cm and bd and going back allows me to see if I bd that day and if I had any fertile cm. giving me an idea of whether I could have ov on a later day and if I bd for chances of pregnancy. So as of today going back 14 days would put me at a March 3rd ov and according to my cm there is pretty much no way i ov then. Mostly likely the day or two before. This just gives me a better idea of if this late af is truly late based on ov or if it's possible I ov later than I thought and af is really on schedule.
Sorry so dang long but I hope my " rationale " helps anyone! It has helped me put all possibilities into perspective and has allowed me to relax and wait for a week late before I start to test again or call the doc for some blood work.