Thanks for your question on Health Care Magic.
I can understand your situation and problem.
Since you are young and your reports are normal, no need to worry for major heart or lung related diseases.
In my opinion, you are mostly having
stress and
anxiety related
chest pain.
Stress causes
gastritis and this can cause chest pain.
Avoid hot and spicy food. Avoid junk food. Avoid large meals, instead take frequent small meals.
Start
proton pump inhibitors and prokinetic drugs.
Don't worry, you will be alright.
Avoid stress and tension, be relax and calm.
Hope I have solved your query.
Wish you good health. Thanks.