I sometimes feel a weird sensation in my heart that gets worse when I breathe in.When I breathe in, it feels like a sting in my Heart, but when I exhale, the thing goes slightly away.I have a hard time breathing, because i can t breathe in fully without it stings in my heart.It s really hard to explain, but hurts a lot and i need to hyperventilate because i cant breathe in fully you-know. It hurts a lot, and lasts for a few moments. I m scared that something might happen and i ll die.