Having chest pain
or pressure many times seems to be trivial turns out to be due to some abnormality.
What is you age at present,and what kind of murmur in the heart as murmur may come in many heat valve condition or hole in the heart . Some time only anaemia
may cause mumur ?
You need to check with a Physician.Go for a ECG and a Xray chest and if required a Echocardiography
and TMT may be advised to know the cause of your pain and pressure.
A complete blood study of counts,Haemoglobin
and Blood sugar and kidney test may be required.
Do you have high BP
and are you a smoker are the question wich needs to be answered.
Go for medical Check up