Just wondered out of interest if the room temperature affects your BBT?
I live in a large block of flats and unfortunately have no control over the tempterature due to heat rising (14th floor but amazing costal views!)
. I am also unable to open the windows on occassions due to the wind (sea breeze - yeah right more like sea gales!) . We recently had some bad storms and i think all the old people put their heating up and i noticed on these mornings that my temperatures were slightly higher than normal.
Can anyone shed some light on this?
I live in a large block of flats and unfortunately have no control over the tempterature due to heat rising (14th floor but amazing costal views!)

Can anyone shed some light on this?
