I have been there before. Let me give you some advice.
1, you are still young, don't give yourself too much psychological pressure, too much pressure will make you sick and go to the hospital.
2. Stick to some fitness exercises.
3, short can also be increased by targeted exercise in the later period, as long as the method persists, it can be successful.
4, abstain from alcohol (not self-defense), don't stay up late, it is best to have a small amount of alcohol and tobacco. There are still some bad habits, so we should try to control ourselves and correct them.
As long as you are full of positive energy, one day you will completely remove this heart disease like me! I wish you an early recovery of self-confidence.