Hi and welcome to the forum! I am glad that I can help you.
You would like to know whether the symptoms that you experience are something serious to worry about.
Usually young individuals experience heart disease-like symptoms although there isn't any underlying medical condition. They experience these symptoms due to lack of sleep, consumption of alcohol and coffee, or anemia. This condition is normal and usually not followed by any medical condition.
Given the data that you described, it does not seem likely that you experience these symptoms due to heart issues. Get at least a minimum 8 hours sleep per night. Avoid consumption of tea and coffee because they affect the brain system by keeping them awake. Consume vitamins such as those from the B-complex group. You may consider having complete blood count to rule anemia. You may also need to have an ECG to rule out any heart issues.
Please keep in mind that I provide medical information only. I am not able to diagnose medical conditions online. Please contact your doctor for further advice and information about diagnosis and treatment of your current condition.