What are possible causes of the symptoms I am having? Felt fine all morning, high energy. A little while ago I began to feel week and shaky while standing preparing lunch. Felt I needed to sit down. Ate lunch that included a chicken breast and cheese and veg. Took my blood sugar afterward. It was 98. Began feeling better as soon as I sat down. Think I’m feeling better after eating and sitting but still feel a little weak. Might this be about blood pressure or is there something else I could get checked? Thank you.