I would bdance from day 10 - day 18 to increase your chances
Do you do you bbt? this is a really good way to check and see if you have ovulated, i do mine and this month i have not ovulated (annovulatory), if i had not been temping i would certainly be doing a pg test by now as i would be due AF and would be classing myself as late
Taking Charge Of Your Fertility by Toni Weschler is a really good book to get hold of, it explains all about your fertile window and how to temp correctly.
Good Luck and relax - i know how you feel