Temping and shift work

Mattie • Elsa Jacqueline born Dec 21/14
My DH and I are on month 5 of TTC #3 and if I'm not successful this month I want to try tracking BBT next month. However I'm a nurse and work 12hour days and nights so my sleep pattern is always out of wack, what tips do ppl have for tracking temps if I can't always take it first thing in the am.