Mary - to answer your question about health problems (usually called "complications"). The risks of all complications are lower with lower blood glucose levels, but the odd high result doesn't mean you'll get complications immediately - home blood glucose tests for type 2 diabetes are more for you to see how various foods affect you. With type 2 diabetes, there is often a period of time before diagnosis and treatment start, so damage may have already started. Your GP surgery or hospital clinic should carry out an annual review, including blood tests, to monitor blood glucose levels (HbA1c measures over 2 - 3 months) and cholesterol, blood pressure, urine tests to monitor kidney function, eye examination to look for retinopathy (damage to backs of eyes) etc. This means that problems should be detected at an early stage and action taken if appropriate.
Apart from diet and medication (not always required, may be tablet or injectable insulin or Byetta), keeping fit and active is also very important - so hope you find something active to enjoy if you're not already doing some.