Left side chest pain. What should i do?

Hello Doctors, I have been struggling with left side chest pain since December 2019. I have consulted 1 Pulmonologist, 2 Cardiologist, 1 Psychiatric, 1 Orthopaedic and 4 MD physicians but no luck. I am feeling pinching pain in the left side of chest for less than 5 seconds then goes away. Once It starts then It remains for 10 to 15 days then go away. For the further next 10 to 15 there will be no pain. I have done around 8 ECG, 2 Echo, 2 TMT, Troponin blood test, KFT, LFT, Cholesterol, CBC, SPOT, SGPT, Chest X-rays but all reports comes normal. Neck X rays says Cervical problem but I mostly feel pain in left side.When pain starts I always think that it is coming from heart Occasionally it happens on right side too. I don't have sweating, breathing issues. Mostly it is pinpoint chest pain at the same position on front left chest and upper back. I can run miles and walk. Kindly suggest what should I do ? I am not able to concentrate in my life.