Hello lovely ladies!

I am a night shift worker (3-4 consecutive night shifts per week), so my sleeping patterns are fairly diverse!

My question is, can I rely upon BBT's if my waking times differ every day? I know that you need to have at least 3 hours of uninterrupted sleep, which I achieve, and I also try to monitor my CM to help with charting. I'm just concerned that my wacky sleep patterns will alter my charts enough to make pinpointing ovulation difficult...

As a note, not actively TTC at the moment, but I wouldn't mind a surprise BFP