Heartburn can be triggered by what you eat and drink, such as: a big meal high-fat foods spicy foods chocolate citrus fruit juices drinks containing caffeine, including coffee, tea and cola alcohol (which is not recommended in pregnancy) Other things that may trigger heartburn include: doing exercise soon after eating lying down after eating feeling anxious Because everyone is different, it's a good idea to take note of the particular foods, drinks or activities that give you heartburn while you are pregnant.