I have had GD twice and expect to get it again this pregnancy, at times my levels in the morning were high even though i hadnt eaten anything, I think its because your body needs constant food to keep your levels down (which I know is hard when your meant to be sleeping) but it may have had something to do with what you ate for tea too, if its just happened the once or just happens occasionally I wouldnt worry too much, unless every reading of yours is high I wouldnt be too concerned, when I was preg with DS2 my levels sometimes were 7.4 during the day and it read like that a few times even though i had eaten things previously that turned my levels fine, when i went to my app I told her I was concerned that my levels were getting oout of control and she said that being over 7 a couple of times is fine, she said some women go over by up to 11-12!!!! I also found that if i tested after sitting in the sun or having a massage my levels would be high, weird hey?