I am a 56 years old female, Hispanic, I weight 170 lbs, and 5 foot tall; I am healthy, I exercise everyday, and eat very healthy also. Recently because, I am not loosing much weight, I had a Hemoglobin A1C and the results were 5.9, therefore, I am pre-diabetic. Then I had a overnight oximetry reading that show a 52% level at 4:00 AM. I am concern, about this findings.