Hi, Thanks for using HCM.
Relax. This need not to be cardiac cause also. Don't strain your self.
Severe pain with deep breath may be due to other causes like musculo skeletal problem or gastric problem or due to pleuritis. These can be treated symptomatically and with othere drugs for the root cause.
Since diabetic and considering your age, I advice you to get examined once by your doctor to rule out any cardiac cause. In diabetes there may not be any classic signs and symptoms of
heart attack. Just get done one ECG, BP to rule out heart attack and one ECHO cardiography.
For now since you are controlled with sugar level continue the same treatment and can take
pantoprazole with
domperidone 30 min before dinner every day for any reflux disease or
gastritis.
After evaluation if cardiac cause is ruled out then, start adequate regular sleep, plenty of fluids, nutritious diet with required calorie and regular outdoor exercises for your wellbeing.
Hope I answered your question. Consult your doctor for further management.
Feel free to ask me if you have any further queries or doubts and I shall be glad to help you out.
Wish you good health. Take care.
Regards