Where can I get a tiny blood glucose meter?

Pharmacy. Check your pharmacy. There are many models and sizes. Some interface with your computer or smartphone now too.
Glucose meter. You can buy glucose meters at any pharmacy. Some of the larger drug stores also sell them. They are not very expensive but the test strips are so make sure you get one that your insurance will cover. There is a new one that can be used with an iphone it works very well and the refills are fairly reasonable. Go to any drugstore or pharmacy and asked them and i'm sure there will be able to help you.