Hi dear thanks for query. I understand gastric is unbearable or irritating pain for any person. You might have skipped your food for a long time. Which is causing gastritis. You haven't mentioned any symptoms like burning in throat, pain below chest, is there any vomiting, how often you feel hungry.
1. Just get checked to what stage it has reached, exmp: are there any ulsers by doing endoscopy.
2. Pelvic Scanning will help you know, the stones in gallbladder. If any? Don't worry of these things it is just an information. You can discuss with your doctor and decide.
Accordingly you can start medication in homeopathy. Do not hesitate or need to be scared. It is a common problem. Try to visit proper doctor for guidance and assessment. Take care.
Next Steps
Visit gastrointestinal or any homeopathic doctor.
Health Tips
Try to work on emotions which is causing stress and leading to gastric problem, don't apply anything that is given in internet to your self, try to have healthy foods avoid any food that is deep fried/ oily.