HI.
Thanks for your query and an elucidate history.
You have a classical history which says that the pain on the left side of abdomen increases on empty stomach or after eating.
This relation with the food habits indicates the following reasons::
Gastritis /gastric ulcer/
Duodenal Ulcer / possible gastric cancer/
Pancreatitis in rare cases.
I would suggest you the following::
Zantac 12 hourly.
Pepcid every 3 to 4 hours when on empty stomach.
Add
Domperidone or such motility regulators.
Soft bland diet.
No aerated colas / soda/ drinks.
Early dinner. No late nights.
Treatment for anxiety (as prescribed / needs a prescription by your Doctor)
Lying in a reclining position
Walk around after dinner.
Think of the factors which increased the present problem, GERD, anxiety and try to avoid.
If no relief, get Upper GI endoscopy done and get prescription for added Medicines.
Also needed is
ultrasonography of the abdomen or a CT scan for ruling out other pathology of the pancreas and other structures of the upper abdomen.