Chest pain, stomach discomfort back pain

I have constant chest pain in left side from 1.5 months and the pain is of different types. Sometimes its burning, sometimes its tightness and discomfort, sometimes sharp pain etc. I did ecg, echo, tmt and other blood test for cardiac issue but all reports came normal. Then i moved to lung doctor, he did x-ray and other test which also came normal. I have also stomach pain and discomfort in upper part above belly since one month. Also have back pain etc . I am sick of stomach and chest pain. Other reports also came normal like b12. Please help me with stomach, chest and back pain. Here are the list of medicines from month i took like - rabium dsr, etoricoxib, mac rd, ace proxyvon, etizola beta. But no relief. Please tell me which further step i should take. One more thing i have constipation from childhood.