Basically - from early/mid-afternoon onwards I am fine but from getting up until then I am not.
I wake up feeling OK, I have breakfast and then start to feel slightly light-headed and headachy for several hours. Never too bad but always there.
By lunchtime I am also feeling rather tired but once I have eaten and had a 10 minute snooze I start to improve and I am then fine for the rest of the day.
My recent test for diabetes showed no problem so I don't think it is a blood suger issue?