Hello dear,
The symptoms as mentioned in your post can be attributed to:
1. Gastrointestinal cause- due to accumulation of gas and excess acid formation in stomach.
Appearance of pain on drinking fizzy drinks is suggestive of the same.
Symptomatic relief can be obtained with intake of
Proton pump inhibitors like
Pantoprazole, which prevent acid formation in stomach (to be taken before meals)+ antacid gel (to be taken after meals).
2. Spasm of the chest muscles- management will involve application of
muscle relaxant gel & intake of
analgesic (like
Diclofenac) + Pantoprazole preparation.
However, considering the fact that you have a family history of heart diseases, an ECG should be done to rule out any Cardiovascular cause for the symptoms.
So, kindly consult your Doctor and start treatment as advised.
There is no need to worry, you will be fine.
Take care.