Hey. So I've had a chest pain since 4 days ago, and it wasn't anything special the other days, but today it's really distracting me. It occurs whenever I'm breathing, and I can feel it in the left side of my chest. I don't think it's my heart, but I can't say for sure. I can't really feel it if I'm laying down, for example when I was waking up and laying in the bed, I didn't feel anything until I stood up. Anyone experienced this?