Thank you very much for the useful information Vincent.
Glad to hear that the chest x-ray, especially the EKG turned out to be normal thus ruling out a serious possibility like a heart problem.
Since you had cough due to bronchitis, and that too for a significant duration, this is most likely a result of localized muscles spasm (most of us experience this whenever we have a prolonged or severe cough).
Reduced oral intake, dehydration or electrolyte imbalance can also contribute to muscle spasm.
Another possibility is of costochondritis (inflammation of the costochondral joint) also known as teitz's syndrome, which can give you similar kind of sharp and localized pain.
There there are other problems we should consider. You have been under stress, get episodic palpitations/rapid heart rate, and also had slightly high systolic blood pressure ---- if all these symptoms are not due to your heart then what else it can be?
The answer is that it can be due to anxiety or panic attacks.
Yes this is very common condition, even my closest friend had this problem some time ago. He used to get all the symptoms related to heart but the investigations (in detail) were normal, so he was put on anti-anxiety treatment and it worked.
In your case there is a remote possibility of transient cardiac arrhythmia which might give you these symptoms. An EKG is usually not a good investigation to determine such "transient arrhythmias" as this is only a 6 seconds strip. Holter's monitoring is more sensitive technique which is done by wearing a device for 24 hours which records any abnormalities in the heart rhythm during this period, which may be transient and the routine EKG fails to pick it up.
Once a cardiac cause has been reliably ruled out by your cardiologist, only then we can attribute this to anxiety. Therefore at this point you should have a detailed re-evaluation done by the cardiologist, while continuing with the symptomatic management.
I emphasize on cardiac re-evaluation because you have 3 risk factor for heart problem. History of smoking, family history, and male sex.
Try using Motrin or Aleve for the pain.
Muscle relaxants (like heat application and drugs like tizanidine) can also help.
Drink lot of water.
And discuss all the details i have mentioned to your doctor, in order to get further opinion and management plan chalked out.
I would have been worried too if I were at your place, but let me reassure you that this is a treatable condition and carries a good prognosis with appropriate management.
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