Hello, I would be happy to help you with your question.
Most women ovulate around day 14. It is not uncommon for there to be variation in terms of when you ovulate, which could have been as late as day17-19. During ovulation, there is a brief, abrupt drop in estrogen
levels that often is associated with a small amount of spotting. The cramping at that time also suggests that you were ovulating. Additionally, it is not uncommon to have spotting with intercourse. If the bleeding with intercourse becomes recurrent, then you need an exam with your doctor. You also need to check a pregnancy
test at the time that you would have expected your period and again one week later.
I hope this helps and good luck!