BBT and working nights

So... I have been thinking about bbt since I have been TTC for about 7 months now without any luck.

I plan on taking a brief hiatus on actively TTC and going with the -- whatever happens happens philosophy while I am switching to a new job in the next few weeks.

I figured I might as well do the bbt just to get a couple months worth of data before actively TTC again. *** tricky part is ill be working nights 7pm-730am.

When would be the ideal time for me test bbt? I only work 3 days a week so if I work Monday night and I sleep into Tuesday and take my temperature around 130-2 when I wake up ... If i don't work that night, I'll be waking up earlier like a normal person the next day.

Anyone else in this situation??? What do I do!