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So having sex 3 or 4 days before you ovulate and on the day you ovulate will give you the best chances of getting pregnant. Michelle Stephens Hello, The last day of my period wasMay 16/17, I had unprotected sex on Jun 3rd, according the ovulation calendar I missed the window to get pregnant because my period I due on Jun13th.
If you have regular periods, youâll probably know when this is. If youâre not sure when your next period is due, you can do a pregnancy test 21 days (three weeks) after you last had unprotected sex. See Further information below for links to more about how your menstrual cycle works. Some very sensitive tests can be used even before you miss a period.