Hello lild , welcome to healthcaremagic
Your symptoms are may be due to an upper gastrointestinal tract lesion and i would surely ask you to get a upper GI-endoscopy
done along with a ultrasonography
of your abdomen. Are you a heavy smoker ? or do you take " pain killers " on a regular basis for other complaint ? Are you hypertensive ? please get your blood pressure checked at the earliest . A gastroenterologist can help you out with this problem of yours and I strongly recommend an appointment with a gastroenterologist of your choice. Meanwhile got to a lab and get these following test done for you, stool for OBT( occult blood test
) and complete blood picture. hope i have been able to help you. Take care.