Hello Pipsy,
Yes BS stands for blood sugars.
The HbA1c is a blood test that very cleverly looks at your blood sugars and averages the levels over the previous 2 to 3 months. It is the test normally used to finally diagnose Type 2, and is also done at intervals after that (3 monthly initially, then 6 monthly and sometimes only annually) to keep an eye on your average levels. If you want to know what yours was, you can ring up and ask. You can also ask for a print out of your test results, which may include cholesterol, liver and kidney functions as well as HbA1c. If you don't know what yours was/is I recommend you find out.