I’ve never been consistent using OPKs. Been trying for 2.5 years. In the past I have used the app and EWCM to predict O. From what I can remember the times I have used OPK‘s it aligned with EWCM and seemed to somewhat align with the app. This month I began taking aspirin after asking my doctor. She said no harm in trying. I decided to use OPK’s from here on out and everything says that I ovulated yesterday… Which would be 2 to 3 days later than what the app was originally predicting. Once ovulation is over my husband and I typically have a hard time keeping up BD. Since I had not been using OPK’s could it be possible that I have just been missing Ovulation, regardless of what my EWCM has been saying? Or do you think the aspirin just deleted a couple of days this cycle?