Thanks for the query.
As the gestational age
progresses the size of the uterus
increases which will cause pressure on abdomen organs.
So because of this you may feel heavy after eating and can feel bowel movement.
So you better take little quantity more frequently.
Try to include juices, milk, fruits etc in your diet which will help to some extent.
You can take antacids before food with your doctor's advice which can help.
If problem persists after these measures better to undergo ultrasound
once to rule out excess liquor, macrosomic baby etc. But don't worry these are not common problems.