Diabetes Go

Type 2 Diabetes Diagnosis Question?

Hi, anyone out there with experience of diagnosing diabetes help with this please.

I was showing usual signs of type 2 so had blood tests done which showed a result of 22. I was prescribed 1000mg of metformin a day 3 days ago which I was told would take up to 6 weeks to show results. However both yesterday and today when I tested my blood at different times of the day my levels have been averaging out at around 9.

With the levels dropping so quickly I was wondering,
1. Can the metformin work so quickly?
2. If not then have I possibly been misdiagnosed?

Thanks for any advice.