Dear sir. Your symptoms can definitely be caused by galbladder disorder. If antiacid drugs didnt help, then the first thing you should think about is gallbladder
stones especially if pain becomes more intensive after eating. Coca -cola can trigger pain too. You should do abdominal ultrasound
or CT scan
to see is there any other intraabdomina ldisoreder. Till that,change you dietary habbits.
The best and almost the only treatment for gallbladder disorders is surgical procedure, which is routine procedure today and usually done laparoscopically. You need to stay in hospital for 1-2days after it. If your symptoms persist you should do it definitely.
Wish you good health.