Upper abdominal middle pain. I do!

Hello I had pain in upper middle abdominal pain it is mild but sometimes it will be severe like in night also I don't feel pain while walking means it is not increase when j climb 5 floors I feel little bit heartbeat increase and breath heavily so I go for ecg and echo test which are the normal also they did troponin test all are normal show to the doctor also they sad it is because gas and acidity and then they will give tablets for stomach pain and acidity then my stomach is normal after 1 month again I have pain in middle upper abdominal pain and also two hands and legs are paining so I did again ecg but it is normal because of I have legs pain and little bit fatigue in tmt I go for a one center but they sad your BP is increase and I have little bit fatigue I not able to do so also in previo5i have mild anemia should I go for anu other test of heart related should I have angina problem what should I do