Thanks for writing to us.
As per the available info ,it seems to be Acid Peptic Disorder or simple Hyperacidity
due to irregular/non timely food habits. In addition in all probability you could also be suffering from a benign /harmless condition called Costochondritis
. Sometimes without Physical examination it is difficult to pin point the diagnosis.It could also be due to Fibromyalgia
The above three pointers to Differential Diagnosis.
Kindly try over the counter anti inflammatories and antacids .If the condition does not subside get a check up done by a physician.
In all probabality please be reassured that you have no heart ailment even though the location of pain is to the left side of your chest.
Dr Lt Cdr ASN Bhushan.