You'll need a few diagnostic procedures to identify the reason for your vomiting and stomach pains. You need blood analyses (blood count, sedimentation, liver status, renal status, Helicobacter pillory-serologyâ¦), an abdominal ultrasound and gastroscopy. ECG and chest X-rays are also necessary to investigate the chest pain. If all the tests are OK, then depression or anxiety could be reason for your symptoms.