Hello. So, an aIc of 8 is a blood sugar of 183 mg/dL (10.2 mmol/L) approximately. Here's a chart: https://www.mayoclinic.org/tests-procedures/a1c-test/about/pac-20384643. You need to have the score two times in order for it to be meaningful. So, they will test you again.
8 is too high though. It would mean your sugar level is not controlled and puts you at greater risk for diabetic related complications. Have you been diagnosed with pre diabetes or type 1 or 2 as of yet? I'm just trying to find out more related to this particular test.
Your level should be below 5.7. That's the best. Let me know any other information you want to give and we'll go from there!