Chest pains won't go away no matter what I do

I've been experiencing chest pains for most of my teenage life (I'm 16 as of now), and absolutely nothing is helping. I'm on acid reflux medication, anti-anxiety medication, I've been eating healthier, I'm exercising almost daily, but nothing has helped and it's frustrating. The pains are mostly on the right side, but sometimes the pain spreads to the middle, to the right, or all 3 spots, and the pain is starting to go through my right arm and it has been doing that for a couple months now. Even when I don't feel the pain, I can feel a weird pressure on my chest, or my back hurts or my stomach hurts or my arm still hurts. I've been to so many doctor appointments for it but they've done nothing but brush it off as a lack of sleep. I seriously think I have a heart condition, but I don't think my doctors believe me.

ask your doctor for a d-dimer blood test just in case you have a pulmonary embolism or emboli.

Same situation here too.From last one year