I agree that it sounds like timing. 3 days prior and after isn't enough.
I have textbook 28 day cycles too, before and after DS1. When TTC LO2 i was using the fertility ovulation sticks. For three cycles i ovulated on CD14, then the 4th cycle i ovulated on CD11 and we got pregnant with DS2.
Proud SAHM to Connor (8-6-10)
and our little