Needing Advise Late Positive Ovulation Test

We've been trying to conceive for 2 months now and each time I've been tracking my ovulation with a daily opk. Both months they have been positive 1 week before my period is due. My MC is normal, it averages between 28 to 29 days. It looked like I had a positive opk on day 18 of my cycle so we did the BD and put in my menstrual cup right after. Now I have a positive opk and we won't be able to do the BD till tomorrow! AND my preiod is due this coming weekend!? 😶 Has anyone else had this problem?