If you didn't pass your one-hour glucose test and now have to take the three-hour test, it's crucial to follow your doctor's instructions. This test helps determine if you have gestational diabetes, which is important for your health and your baby's health. Before the test, your doctor may give you specific instructions, such as eating more carbs or avoiding sugar. Most likely, you'll need to fast from midnight until the test. During the test, you'll drink a glucose solution and have your blood drawn multiple times over three hours. It's important to stay calm and not overexert yourself during this period. Bring something to keep you occupied, like books or a computer. After the test, have a snack ready in your car to eat immediately. If you feel sick, consider having someone drive you home. Remember, the one-hour test is easy to fail, but the three-hour test has more reasonable thresholds. Only a small percentage of people actually have gestational diabetes. Stay positive and follow your doctor's advice for the best results.