Chest Pain & heaviness and back Pain.

I am having Mild to Moderate Chest Pain & heaviness and pain in lower back since last 2 Weeks...i thought its beacuse gastric problem due to spicy and non veg food that i used to take...considering these i consulted online to a  doctor, who suggested me to take Deltone 60 tablets and Sucral O Syrup. Last year i was having problem of GERD but after taking medicine it was properly diagnosed. I took above medicine for 6 days then heaviness and chest pain relieved but from yesterday i am again experiencing heaviness in left portion of chest. I took vaccine Covishiled on 9.5.21 after that this problem increased, i don't know whether it is side effect of vaccine or not. I am living in small town of bihar, no any doctor and hospital is opened in my town and nearby town beacuse of this i am unable to undergo ECG. Please suggest what to do for now...it will be great help for me.