BBT and working shifts

Laura

Hello

I've just started trying to track my bbt.Can anyone advise on whether it is even possible to track but when working shifts? I work random patterns of days and nights and at the moment I'm getting a very odd pattern so I'm not sure its very effective as I can't track at the same time and following 4 hours rest/sleep.

I've attached my ff chart to show what results I'm getting.

Has anyone got any experience with this? Does it work?

Thank you.