Does anyone know from experience just how crucial it is to take your temperature exactly on waking after a minimum of 3 or is it 4 hours of sleep. I already have 2 ds of 3 and 5 who always manage to get me up to them in the early hours usually 1 or 2 hours before I would usually wake up. I generally get back to sleep but does it mean I'm not getting the right temp when I do wake? I've been ttc since Jan but am new to charting temp. Any advice gratefully received as I'm worried I'm wasting my time!