Welcome to this forum,
Any chest discomfort
should be taken seriously and should be examined and investigated even if you have acidity problem because sometimes it is cardiac and wrongly cosidered as gastric and treatment is delayed.As you are diabetic also so anginal pain may be Atypical remember sometimes heart problem occurs without pain( Silent Ischaemia)
So please get yourself examined and check with a 12 lead EKG ( Electrocardiogram) which gives very vital information.
is reasonably controlled and I hope Your lipid Profile
and BP also with in desirable limits.
and Refux can be treated easily by Antacids and Acid suppressing drugs like (Ranitidine
,Omeparazole) once cardiac cause is ruled out.
Later on you can go for a Stress Test(TMT) to rule out significant Heart problem.
Take Good care
Good Luck to you.