Actually, a normal fasting level does not have to be exactly 90. The range is 80-100, with optimal levels being below 95.
when you wakeup in the morning it sould be 90
If 139 was a fasting number (meaning you had not eaten prior to being tested), it's too high. Normal fasting levels should be between 80 and under 100. Did you doctor order the test? Do you have a history of diabetes? Did you test at home?
If this is brand new, you need to contact your doctor, and have a full work-up, which will include other lab tests, like an A1c, which gives a picture of what the blood glucose is over a period of a few months, versus just at one point in time. Your doctor will likely do some other testing as well.
Once the results of all the tests come back, your doc can sit you down and tell you what you're looking at, if you are indeed a diabetic, pre-diabetic, or if there is another concern, and then discuss with you what to do about it.
Call and make yourself an appointment. Keep us updated!