Your complaints are, probably, due to acidity which is a common complaint during pregnancy. You please, do the followings: 1. Avoid spicy and fried food and citrus fruits. 2. Take frequent and small food. 3.Take some antacid like Digene and gelusil mps etc. 4. Have a sound sleep and slow morning and evening walk. 5. You may take cold milk and keep tension free.
Next Steps
Nothing to worry. Because of twins you may have a bit more problems which are normal in multiple pregnancy.
Health Tips
please, follow the directions of the attending doctor.