Talk to Chest Respiratory Specialist on Light Cheat Pain/discomfort On Left Side

i feel light chest pain/discomfort continuously from last 9 months.. had ETT done in September 2021 it was clear..did ECG 3 times it was clear.. this pain travels from one place to another sometimes it feels continuously in middle of chest and sometimes on left side of chest.. sometimes in left back side..sometimes on side of chest below left arm...sometimes in left arm..sometimes a stretch in left cheek.. from the past 9 months this light pain appears suddenly remain for variable time like 10 to 15 days then disappears for few days sometimes a month sometime 2 3 weeks.. The profile of the pain is like discomfort..a blocakge type or pinpoint when in the midde of chest.... from the past 6 months i walk regularly and during walk or any exerting activity i feel normal.. no shortness of breadth.. the cardiologist with whom i consulted sayed you have no heart problem.. you have psychological problem or gastric problem.. what should i do now.. since it been 9 months when ETT was done.. shou