Hi. Also 40 and now 6 weeks pregnant. It happened when we went out for dinner, had too much nice wine. etc.... So it certainly helps if you don't get too obsessive about it. (I had my Norplant removed on July 12). Didn't think it'd happen for at least 6 months. So, sit back and enjoy the next six months and if nothing happens you know to contact you ob/gyn. Until then don't count too many days, temps, and all the rest. Just enjoy hubby.