thanks for writing to HCM.com
if you have measured your BP ever in recent past? if multiple readings have come more than 140/90 mmHg? Unless you measure your BP and multiple readings are abnormal you need to bother about it in this manner. moreover constant pain, on left side , for many days, which is present at rest but does not come up on exercise running or walking is unlikely to be angina
. still to clarify all doubts, you need to get yourself examined, so please see your GP and proceed further
if there is anything more please feel free to write.