Bad news

Amber • Mummy to 2 little boy and 1 little girl!
Ok I've had some really bad news, my nan is dying and doesn't have long left (I live to far away so can't make it to see her) and me and my partner are trying for a baby,
Of course I am grieving but don't want to miss out on the opportunity to get pregnant as I know she wouldn't want me to either.
My most fertile date is apparently today (5th)
We couldn't BD on the 3rd and 4th due to us getting the bad news. We did on the 1st and 2nd.
It's 23:26 here in the UK. If I have sex just gone midnight does this mean that it's still classed of having sex on my most fertile day?
I know you will probably think I'm bad for BD when my nan is in hospital :(