WHO guidance: High risk of diabetes HbA1c 42-47 mmol/mol (6.0 – 6.4%)
Provide intensive lifestyle advice. Warn patients to report symptoms of diabetes. Monitor HbA1c annually.
In other words, follow healthy diet and exercise guidelines.
You didn't say how long you had been having symptoms for - remember that HbA1c reflects glucose levels over the last 12 weeks. If your symptoms only appeared in the last month, for example, the HbA1c should be repeated in another 1-2 months.