If you are diabetic and sick with a stomach infection or diarrhea, call your doctor right away for advice on whether you should continue with your medications or not. For example, some diabetics have been advised to not be taking Metformin if they have any sort of gastrointestinal upset as it could cause more harm than good.
Keep track of your Diabetic supplies and make sure you always have a backup. Obviously, keeping a huge stock of insulin isn't feasible as it has an expiry date, but lancets and test strips don't! Keep enough insulin on hand so that you know you'll use it in time, but you also will never be left without it.
Find a free clinic in your area to have your Diabetes monitored if you can't afford to visit your doctor every three months. You can call your local Diabetes assoc