I experience random rapid heart beats multiple times a day, shortness of breath, and fatigue. Is this something I should worry about?

Hello, I have opened a Reddit account just for this. I’m really struggling because I’m not sure if I am just overreacting. But I have been experiencing these issues for a while now and I’ve only noticed them getting worse.

I would really like some help, I’m really unsure about telling my parents right now as it can be nothing so any advice would be appreciate!