Thanks so much tashybabe and Elocin for your thoughts and support.

tashybabe, I do lie still, I can definitely hear the beep if it does work, otherwise nothing whatsover happens. If I check it (after a loooong time of no beeping) it will show a temp, but I suspect it's the default temp the thermometer flashes when it turns itself on (37). I have tried a multitude of different depths and techniques and it seems random as to when it does or doesn't work. I guess I just don't have the knack.

Elocin, PCOS has been excluded in the past, everything is in the process of being re-checked again now though. I was a bit perplexed at charting again since as you said, erratic charts are a hallmark of anovulatory cycles, which I have a history of. Since I've been asked to chart again I'm happy to, but I don't feel comfortable with the v method. If I could take temps consistently that'd be fine - but since I can't, it is kinda doing my head in. It's all a bit stressful first thing in the morning and is not getting my day off to a good start!

From both your comments, I am going to try orally instead and ensure to be super consistent with side of mouth etc and see how I go.