It appears as if you have two major issues: family history of pulmonary emboli (blood clots in the lungs) and recurrent gastrointestinal pains.
A family history of pulmonary emboli can mean there is either a family history of cancer or a genetic component that is causing the blood to be hypercoagulable (easier to form clots). Cancer is one of the major causes blood thickening that results in clots in the veins of the leg (deep vein thrombosis) which can break off and float to the lung. Genetic causes for hypercoagulation are known to run in families. Factor V Leiden is one of the most common genetic causes of hypercoagulability occurring in 3-7% of the general population. Other causes include Prothrombin 20210A, Lupus Anticoagulant, Protein C or S deficiency, etc. These genetic diseases result in blood that clots more readily and can result in blood cloots in the deep veins of the leg (deep vein thrombosis) which can break off and end up in the lung. Blood tests can determine if you any clotting disorder – your d-dimer test appears to be normal given the clinical circumstance. If your doctor suspect blood clots in the leg, a doppler study of the lower can visualize the veins.
You second condition relates the the gastrointestinal tract. Most common causes of abdominal pain in young females include ovulatory pains, endometriosis, irritable bowel syndrome, gastroesophageal reflux, peptic ulcer disease or food allergies (including lactose intolerance). More rarer are diseases such as ulcerative colitis or crohn’s disease. Your gastrointestinal condition should be evaluated by a gastroenterologist who can properly test you for the conditions. If you are indeed experiencing symptoms of diverticulitis (which is rare in someone of your age), a CT scan of the abdomen and pelvis with a colonoscopy to follow if there is suspicion of colonic pathology.
In the end, if your doctor is blowing you off and does not seem interested in diagnosing your condition, it might be time to search for a new one.
