Hello, 
Get investigated (Barium swallow, 
Upper Endoscopy, Esophageal endometry) for pain in the lower abdomen. Commonly pain & discomfort in the lower abdomen is due to GERD & 
Acid Reflux. Some food trigger these symptoms like high fatty & oily food, citrus food, alcohol, caffeine, etc. Obesity & sedentary lifestyle may also trigger the discomfort. Medications like Spasmol, antacids, PPI's & H2 Receptor blockers are effective. 
Lifestyle changes do reduce bloating, 
abdominal pain, 
constipation & 
diarrhea. Quit smoking or addictions if any. Do regular exercises, maintain weight, avoid sedentary life. Add fiber in diet, take plenty of veggies & fruits. 
Hope I have answered your query. Let me know if I can assist you further. 
Regards,
Dr. Nupur K, 
General & Family Physician