If you're in the United States, my friend, then a blood glucose level of 38 mg/dL (milligrams per deciLiter) is DEFINITELY low. If, however, you live in a civilised [civilized, if you are, in fact, one of my American cousins] country that uses the International Standard of blood glucose measurement, then 38 mmol/l (millimols per litre) is, indeed, high, and you should be admitted to hospital post haste for emergency treatment.
38 mg/dL does NOT feel like death, my friend, though it would probably make you feel anxious, lethargic, uncommunicative, lethargic/tired, trembling, confused, etc.
38 mmol/l would have you peeing as though it were an Olympic event and you were representing your country.
A 'normal' fasting (after not eating overnight) blood glucose level for a non-diabetic would normally be in the range 70 to 99 mg/dL [3.9 to 5.5 mmol/l].
Two hours post prandial (after eating) a non-diabetic's blood glucose level would not normally rise above 140 mg/dL [7.8 mmol/l]. I say normally as there are occasions when it could go higher, such as if the person being tested had an underlying infection at the time of testing; the person being tested as undergoing a period of extreme stress at the time of testing; or the person being tested was taking certain types of medication which are known to cause a rise in blood glucose levels. (These medications often include steroids, such as the types prescribed for the treatment of asthma, or for treating certain specific types of infection.)
A non-diabetic's blood glucose level would NOT normally be affected ... at least not to any significant degree ... by what you'd had to eat, whether it was full of sugar or not, as the pancreas would produce sufficient insulinfor the body's cells to utilise [utilize] the glucose from your bloodstream to create energy. If, however, the blood test that was carried out was a simple fingerprick, did you wash and dry your hands before having the test done? I ask this as there are many contaminants that could adversely affect the results obtained ... food and drink being just one (or rather, two) of these.