Indigestion and heartburn are common discomforts during pregnancy, especially in the second trimester. To manage these symptoms at 21 weeks, try eating smaller meals throughout the day instead of large ones, as this can help prevent overloading your digestive system. Avoid trigger foods like spicy or greasy dishes, carbonated drinks, and caffeine. Instead, opt for a balanced diet rich in fiber and drink plenty of water to aid digestion. It may also be helpful to elevate your upper body while sleeping by using extra pillows or a wedge pillow. Over-the-counter antacids approved by your healthcare provider can provide temporary relief from indigestion and heartburn. However, it's important to consult with your doctor before taking any medication during pregnancy. If symptoms persist or worsen, seek medical advice for further evaluation and treatment options tailored specifically for you.