An A1C of 4.8 would indicate an average of 93.58 mg/dL. That would make me want to eliminate any technical/equipment issues.

1. Your glucometer may be returning high readings.
2. The A1C test you did may have returned a low reading. (The way your post reads, it sounds like maybe you did this at home, rather than from a lab result. If it was a lab result, then the first thing I would do would be to check the glucometer.)

Either of these can be checked by taking meters with you to the doctor to compare to a blood draw test.

Are you checking your fasting glucose right after you wake up, or are you doing other things first, then checking after you've been up and moving around -- making the bed, getting dressed, brushing teeth, waiting to be hungry, etc.?

Are you checking your BG before you eat as well as the 1 & 2 hour postprandial checks?