Thanks for your question on Health Care Magic.
I can understand your concern.
You are having
tachycardia (high pulse rate) and normal blood pressure.
You are also young, so possibility of
heart disease is very very less.
But better to get done screening for heart diseases by ecg. If ecg is normal then no need to worry for heart diseases.
Sometimes stress can also cause tachycardia and
Chest pain. So avoid stress and tension, be relax and calm.
If you are having poor eating habit like junk food then
gastritis can also cause chest pain. So avoid junk food and take antacid like
proton pump inhibitor.
Don't worry, you will be alright.
Heart diseases is less likely in your case.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.