Ketone Level - Starvation Mode?

Hi.  I am finishing day 8 of the keto diet and have lost 7 lbs!  I purchased a ketone breath Meyer to monitor Ketosis, and I am routinely hovering over 4 mmol.  In fact - last time I tested it was 7.55 mmol!  According to the graph, this is considered “starvation mode” and higher than and not optimal.  I also have been feeling quite fatigued with sort of a headache.  Yesterday I felt very clear-headed, though.  Are my levels a bad thing?  Why are they so high?  Should I do anything about it and what? Thanks!