Thank you for all the information.
I feel you need an examination by doctor again.
There can be an onset of infection as the cough has become productive.
This can cause pressure, pain in chest.
Sputum test, X ray can be taken.
Sometimes heart issues like angina can cause chest pain, which radiate to back along with dizzy feeling.
An EKG, stress test can be considered too.
Please try to have rest, keep good hydration.
I hope this information helps.
If there’s anything else I can do, please let me know.
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