By cleaning your digestive system from toxins, stomach acid production will decrease, which in turn will also decrease the likelihood of heartburn. You should also drink plenty of water instead of taking carbonated drinks. If you can, try to drink water that is in room temperature. This will help flush down toxins and it will also help dilute the acid in your stomach. You should also stop smoking as nicotine can damage your LES or the lower esophageal sphincter, which is primarily responsible for preventing stomach acid from reaching your esophagus. After eating, you need to avoid lying down as this is the best position for the stomach acid to flow back or reflux in to your esophagus. This is because large meals tend to overwhelm the stomach and it will produce excessive stomach acid in order to digest excessive food. Instead of eating 3 large meals a day, go for around 6 smaller meals a day. This will keep acid production in check and eventually prevent or at least lessen heartburn. This is mainly because the belly swells due to the presence of the baby. It puts pressure on the stomach, which pushes stomach contents, such as acid, up. Obesity is also another contributing factor to chronic heartburn. The reason behind this is because of the fat belly, which also puts pressure on the stomach. You need to allow your stomach at least 3 hours before you turn in. As much as possible, you have to avoid lying down after eating dinner. You should also avoid drinking alcohol late at night as this increases alcohol production in your stomach and it also relaxes your LES or lower esophageal sphincter. Eating slowly will also help in managing heartburn. Try to put your eating utensils down between bites and chew your food at least 14 times. For dinner, don t eat too much and never go to bed right after a meal. You have to stay awake at least 3 hours after you eat dinner. This will give the acid levels a chance to decrease before you lie down, which is basically the perfect position for heartburn to occur.