No, it does not mean that ovulation will be exactly 4 days beofre ....You can ovulate earlier or a little later . You have the right idea though ! Usually your luteal phase remains the same (varies by a couples of day at the most each month).
So you think that there may still be a chance that I ovulated around 14 days after the first day of my last period, even if my period was late. I hope so, I just hope I didn't ovualte later than I thought. I am having lots of stomach cramps, but the cm is not like it was a week ago when I suspected I was ovulating. I wonder if the cm will change if I did in fact become pregnant a week ago?????? Thank you so much for your advice.