Welcome to HCM
We understand your concerns
At the age of 13, it is very rare to have heart ailment starting. Your chest pain
could be due to muscular tension or acidity or anxiety
. Heart related complaints tend to increase when you exercise. Is it that way in your case? Breathing problem while watching TV must have been sudden reflex to some situation and then you got anxious and it persisted for sometime. That is it. Same feeling pplies to your dizziness
Therefore don't worry and don't be anxious. Enjoy your life and be happy.