Thanks for your question on Health Care Magic.
I can understand your concern.
In my opinion, your chest fullness is mostly due to GERD (
gastroesophageal reflux disease) because you are smoker and tested positive for H. Pylori.
GERD is due to laxity of gastroesophageal sphincter. Because of this the acid of the stomach tends to come up in the
esophagus and cause symptoms of
chest tightness, fullness, heaviness etc.
So better to take treatment for H. Pylori. 14-21 days of course of
amoxicillin, Clarithomycin and
pantoprazole is needed.
Along with this, you need to follow these lifestyle modifications for better symptomatic relief.
Avoid stress and tension. Avoid hot and spicy food. Avoid large meals, instead take frequent small meals. Keep 2 - 3 pillows under head in the bed to prevent reflux.
Don't worry, with all these you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.