A quick stomach pain after meals, lasting just a minute or two, usually points to acid reflux and not the pregnancy itself. You already have a history of GERD. It can resurface at 6 weeks, especially after stopping your gastro medicine.
Next Steps
Keep taking the antacid and other medicines your gynaecologist has already prescribed for the reflux and constipation. Smaller, more frequent meals and avoiding lying down right after eating usually help too.
Health Tips
See your obstetrician sooner if the pain lasts longer, gets severe, or comes with vomiting, bleeding or dizziness.