Your symptoms of an uncomfortable bloated stomach is not that uncommon in girls your age. There are several possibilities, but the top two are celiac disease and irritable bowel syndrome (IBS). Other diseases are are possible as well, but you aren't reporting any nausea, vomiting, or diarrhea which helps narrow some of the problems. Celiac disease is an allergy to gluten, a protein found in wheat products. Consumption of cereals, grains, breads, and other gluten rich products causes damage to the inner lining of the small intestine. Symptoms are abdominal pain, bloating, and sometimes diarrhea after eating these products. Irritable bowel syndrome is the much more common than celiac disease. IBS is causes bloating, cramping, and sometimes diarrhea or constipation. The cause is unknown and is only diagnosed after other causes of abdominal pain and discomfort have been ruled out.
I think the best physician for you to see first about this issue is you a primary care physician
such as a family doctor or internal medicine doctor
. He or she can take a more detailed history of you symptoms and your diet. The doctor can also perform a thorough abdominal exam. If celiac disease or some other problem is suspected, you may warrant referral to a GI specialist