Oh, I'm so sorry about your dad's death! The anniversaries are about the most difficult part to deal with, that reminder of THE day. I hope that you found a way to remember him and celebrate him!
I would say that you should try to take it at 6 when you first get up. You have an alarm set for then, so you will always be up then. MOST BBTs store the last temp taken so you can read it when you wake up at 10. Hopefully, this would mean that you'd just have a minute or so of temp-taking, then back to sleep.
Sorry I'm replying late! I don't get on here much at night!
Good luck with temping! It's sort of fun.

I hope that you get some rest soon, too--sounds like you've been a busy little bee!