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Your symptoms are probably due to indigestion, acute gastritis, or due to presence of ulcers in the stomach. Since the ultrasound is normal, possibility of liver or gallbladder disorders (gallstones) have been ruled out.
Gastritis occurs when the lining of the stomach becomes inflamed or swollen. Gastritis can last for only a short time (acute gastritis), or linger for months to years (chronic gastritis).
Gastritis pain occurs in the left upper portion of the abdomen and in the back. The pain seems to travel from the belly to the back. Other symptoms of gastritis include - Belching, Nausea and vomiting, Bloating, Feeling of fullness or burning in the upper part of the belly.
First and foremost, you need to need to make your mind and avoid all foods that make your symptoms worse (including your favorite steaks). Adopting a healthy dietary practices and a good exercise regimen will also help.
Some tips to help your symptoms include:-
1. Reducing intake of hot spicy and Fat rich foods, fried foods, is very important.
2. Try eating a little more slowly. When you eat fast, you swallow extra air with your food. Try to not talk while eating. Extra air while eating can lead to belching and gas production.
3. Eating at the same time each day and eating smaller meals more frequently may be beneficial as well.
4. Try to eat a balanced diet. Foods with high fiber may initially increase gas production. However, the this will decrease over time.
5. It is better not to drink fluids with your food. Drinking fluids with meals can increase your air intake and increase gas.
6. Avoid major gas and acid producing foods like -
- Vegetables: Onions, Celery, Carrots, broccoli, Brussels Sprouts, Cucumber, Cabbage,Cauliflower, Radishes , potatoes and eggplant.
- Beans, peas, Green salads, brown rice and leeks
- Fruits like - Raisins, Bananas, Apricots, Prunes, dried fruit
- Carbohydrates rich foods like - Bagels, Wheat Germ, Pretzels,puddings, breads.
- Cured meats and high fat meat products such as sausages, salami, ham, bacon, and Red meats like beef and lamb should be reduced in consumption or avoided totally.
In addition to the above methods, use of antacids (mylanta, tums, gelusil, etc) and acid reducers like Prevacid can help reduce the symptoms.
In case, if you are not helped by medications and by following the above measures, then you should consult with a gastroenterologist for tests including barium swallow, upper GI endoscopy which might help in making a definitive diagnosis.
I hope this helps.