Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Left side chest pain should be dealt with caution. Get an ECG done immediately to rule out cardiac causes. If ECG is suspicious get a tropI done. Most often it would be related to gastritis. You can take antacids like pantoprazole or omeprazole. Hope I have answered your query. Let me know if I can assist you further.