Ok so i should be ovulating today however DH is on nights and i haven't seen him all week, will possibly get chance to BD tomorrow morning but will i have missed the window????

I think, and someone can confirm or deny this, that your egg should live for 24 hours, may be more. So if you BD tonight and you o'ed today, you should be fine.

You are generally most fertile on the days preceeding and the day of ovulation, however there is a window of opportunity from the point of Ovulation (LH Surge) to ovulation itself of up to 36 hours, so BD as soon as possible and you might just catch the egg!
-If you are still getting fertile quality CM around the time you BD, you are still in with a chance. so if you are having milky, creamy or lotion like cm accompanied by a very wet vaginal sensation or eggwhite cervical fluid you may well still be in your fertile period.